Email: jaromir.krepelka@upol.cz
Location: 17. listopadu 50, Olomouc
Phone: (+420) 58563 1518
Fax: (+420) 585224047
Oblast výzkumu:
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Kvalifikace:
Mgr.: Czech Technical University, Praha ,Faculty of Nuclear Sciences and Physical Engineering, Department of Physical Electronics
Ph.D.: Czech Technical University, Praha ,Faculty of Nuclear Sciences and Physical Engineering, Department of Physical Electronics
Ukázat publikace2011
![[DOI]](http://www.rcptm.com/wp-content/plugins/papercite/img/external.png){kind=small}
J. Perina and J. Krepelka, „Joint probability distributions and entanglement in optical parametric
processes,“ OPTICS COMMUNICATIONS, vol. 284, iss. 20, pp. 4941-4950, 2011.
[Bibtex]
@article ISI:000294579200016,
Author = Perina, Jan and Krepelka, Jaromir,
Title = Joint probability distributions and entanglement in optical parametric
processes,
Journal = OPTICS COMMUNICATIONS,
Year = 2011,
Volume = 284,
Number = 20,
Pages = 4941-4950,
Month = SEP 15,
Abstract = Joint photon-number and integrated-intensity probability distributions
are used for description of time evolution of optical parametric process
including processes of frequency conversion, parametric amplification
and subharmonic generation taking into account losses and noise. Using
these tools quantum entanglement of modes based on the separability
criteria is considered and nonclassical properties of the process under
discussion are demonstrated by means of conditional probability
distributions and their Fano factors, difference-number probability
distributions, quantum oscillations, squeezing of vacuum fluctuations
and negative values of the joint wave probability quasidistributions in
time evolution. Sub-Poissonian and sub-shot-noise properties are
illustrated for spontaneous process and stimulated process by means of
chaotic light and squeezed light. Also the multimode processes are
investigated in the spirit of the Mandel-Rice photocount formula. The
description is applied to interpretation of experimental data. (C) 2011
Elsevier B.V. All rights reserved.,
DOI = 10.1016/j.optcom.2011.06.036,
ISSN = 0030-4018,
Unique-ID = ISI:000294579200016,
B. Sen, V. Perinova, A. Luks, J. Perina, and J. Krepelka, „Sub-shot noise photon-number correlation in stimulated and spontaneous
Raman processes,“ JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, vol. 44, iss. 10, 2011.
[Bibtex]
@article ISI:000290452900020,
Author = Sen, Biswajit and Perinova, Vlasta and Luks, Antonin and Perina, Jan and
Krepelka, Jaromir,
Title = Sub-shot noise photon-number correlation in stimulated and spontaneous
Raman processes,
Journal = JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS,
Year = 2011,
Volume = 44,
Number = 10,
Month = MAY 28,
Abstract = The light initially prepared in a coherent state runs the stimulated and
spontaneous Raman processes in a second-order nonlinear medium. Using
analytical expressions of field operators for the light modes, we
determine the quantum statistical properties of the modes in the
stimulated and spontaneous Raman processes. By a choice of phase, we
obtain a boson-pair property correlating the pump and vibration modes
and such a property correlating the pump and anti-Stokes modes. The
Stokes and vibration modes exhibit the boson-pair property for all
initial phase differences between the pump mode and the other ones. In
the spontaneous Raman process only the Stokes and vibration modes show
such a property.,
DOI = 10.1088/0953-4075/44/10/105503,
Article-Number = 105503,
ISSN = 0953-4075,
Unique-ID = ISI:000290452900020,
V. Perinova, A. Luks, and J. Krepelka, „A beam splitter with second-order nonlinearity modelled as a nonlinear
coupler,“ PHYSICA SCRIPTA, vol. T143, 2011.
[Bibtex]
@article ISI:000287518200021,
Author = Perinova, V. and Luks, A. and Krepelka, J.,
Title = A beam splitter with second-order nonlinearity modelled as a nonlinear
coupler,
Journal = PHYSICA SCRIPTA,
Year = 2011,
Volume = T143,
Month = FEB,
Note = 17th Central European Workshops on Quantum Optics, Univ St Andrews, St
Andrews, SCOTLAND, JUN 06-11, 2010,
Abstract = We provide two quantum descriptions of a beam splitter with second-order
nonlinearity. Models of nonlinear couplers could be the same. For
simplicity, a symmetry of the device is assumed, which does not exclude
various reflectivities. The models differ in taking into account the
co-propagation of beams and replacing it by their counter-propagation.
The unitary operators that evolve the input states into the output ones
are calculated by using a momentum operator and the effective distance
of presumed co-propagation and counter-propagation, respectively.,
DOI = 10.1088/0031-8949/2011/T143/014020,
Article-Number = 014020,
ISSN = 0031-8949,
Unique-ID = ISI:000287518200021,
V. Perinova, A. Luks, and J. Krepelka, „Quantum statistics and entanglement in a Raman process,“ JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL, vol. 44, iss. 3, 2011.
[Bibtex]
@article ISI:000285456200017,
Author = Perinova, V. and Luks, A. and Krepelka, J.,
Title = Quantum statistics and entanglement in a Raman process,
Journal = JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL,
Year = 2011,
Volume = 44,
Number = 3,
Month = JAN 21,
Abstract = A simple trilinear Hamiltonian is utilized for a description of the
Raman effect. The method of invariant subspaces, which is suitable for
numerical calculations in the Schrodinger picture, is analyzed. As an
example of the numerical calculation, the time dependence of an
entanglement measure, the so-called negativity, is found for the initial
few-photon states. Most of the analysis is devoted to the Heisenberg
picture, in which the perturbation expansions are known.,
DOI = 10.1088/1751-8113/44/3/035303,
Article-Number = 035303,
ISSN = 1751-8113,
Unique-ID = ISI:000285456200017,
2010
A. Luks, V. Perinova, J. Perina Jr., J. Krepelka, and W. Leonski, „Photoelectron spectra for an atom with one autoionizing level that
interacts with a neighbor,“ in 17TH SLOVAK-CZECH-POLISH OPTICAL CONFERENCE ON WAVE AND QUANTUM ASPECTS
OF CONTEMPORARY OPTICS, 2010.
[Bibtex]
@inproceedings ISI:000291389400032,
Author = Luks, A. and Perinova, V. and Perina, Jr., J. and Krepelka, J. and
Leonski, W.,
Editor = Mullerova, J and Senderakova, D and Jurecka, S,
Title = Photoelectron spectra for an atom with one autoionizing level that
interacts with a neighbor,
Booktitle = 17TH SLOVAK-CZECH-POLISH OPTICAL CONFERENCE ON WAVE AND QUANTUM ASPECTS
OF CONTEMPORARY OPTICS,
Series = Proceedings of SPIE-The International Society for Optical Engineering,
Year = 2010,
Volume = 7746,
Note = 17th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects
of Contemporary Optics, Liptovsky Jan, SLOVAKIA, SEP 06-10, 2010,
Organization = SPIE; Czech \& Slovak Soc Photon; Opt Soc Czech Republic \& Slovak
Republic,
Abstract = We investigate two atoms coupled with a quantized field mode. Whereas
one is the Jaynes-Cummings (JC) two-level atom, the other is an
autoionizing system with two discrete levels and a continuum of states.
In case interactions between the atoms do not occur, the periodic
behavior of the JC atom contrasts with the autoionizing system. We ask
whether or not a seesaw-like interaction between the atoms can change
the behavior of the JC atom. We present photoelectron spectra dependent
on the time for various initial states of the field mode.,
DOI = 10.1117/12.881772,
Article-Number = 77460W,
ISSN = 0277-786X,
ISBN = 978-0-81948-236-5,
Unique-ID = ISI:000291389400032,
2009
J. Perina and J. Krepelka, „Entanglement in optical parametric down-conversion with losses and noise,“ OPTICS COMMUNICATIONS, vol. 282, iss. 19, pp. 3918-3923, 2009.
[Bibtex]
@article ISI:000269766400016,
Author = Perina, Jan and Krepelka, Jaromir,
Title = Entanglement in optical parametric down-conversion with losses and noise,
Journal = OPTICS COMMUNICATIONS,
Year = 2009,
Volume = 282,
Number = 19,
Pages = 3918-3923,
Month = OCT 1,
Abstract = We show that radiation generated in optical parametric down-conversion
with losses and noise is entangled for all times if the coupling
coefficient is higher than half of damping constant and the product of
damping constant and mean number of noise photons. For the process
stimulated by means of chaotic light there is a saturable bound of its
intensity for the generation of nonclassical light. Otherwise the
quantum behaviour and entanglement are fully reduced. Under some
restrictions for noise nonclassical light can also be generated at and
below the threshold. (C) 2009 Elsevier B.V. All rights reserved.,
DOI = 10.1016/j.optcom.2009.06.032,
ISSN = 0030-4018,
Unique-ID = ISI:000269766400016,
S. M. Abdalla, J. Perina, and J. Krepelka, „Non-classical effect of quantum non-demolition measurement in presence
of parametric amplification,“ OPTICS COMMUNICATIONS, vol. 282, iss. 14, pp. 2878-2888, 2009.
[Bibtex]
@article ISI:000267578900035,
Author = Abdalla, M. Sebawe and Perina, J. and Krepelka, J.,
Title = Non-classical effect of quantum non-demolition measurement in presence
of parametric amplification,
Journal = OPTICS COMMUNICATIONS,
Year = 2009,
Volume = 282,
Number = 14,
Pages = 2878-2888,
Month = JUL 15,
Abstract = A full quantum treatment of the problem of quantum non-demolition
measurements in non-linear optical media is considered. The system
consists of four different coupling parameters in addition to different
phase parameters. The solution of the Heisenberg equations of motion for
the dynamical operators is obtained. The phenomenon of squeezing is
examined for both normal and principal squeezing and it has been shown
that it is more pronounced for the compound mode case. The intensity
correlation function is also calculated and discussed where the
observation of the antibunching can be reported. In addition to the
higher-order moments we examined the quantum correlation functions,
joint quasidistribution functions, as well as photon-number distribution
and its factorial moments. It has shown that the non-classical
properties is apparent of this system and more pronounced for the
compound mode (1,3). (c) 2009 Elsevier B.V. All rights reserved.,
DOI = 10.1016/j.optcom.2009.03.053,
ISSN = 0030-4018,
Unique-ID = ISI:000267578900035,
J. Perina, J. Krepelka, J. Perina Jr., M. Bondani, A. Allevi, and A. Andreoni, „Correlations in photon-numbers and integrated intensities in parametric
processes involving three optical fields,“ EUROPEAN PHYSICAL JOURNAL D, vol. 53, iss. 3, pp. 373-382, 2009.
[Bibtex]
@article ISI:000266566600014,
Author = Perina, J. and Krepelka, J. and Perina, Jr., J. and Bondani, M. and
Allevi, A. and Andreoni, A.,
Title = Correlations in photon-numbers and integrated intensities in parametric
processes involving three optical fields,
Journal = EUROPEAN PHYSICAL JOURNAL D,
Year = 2009,
Volume = 53,
Number = 3,
Pages = 373-382,
Month = JUN,
Abstract = Two strongly-pumped parametric interactions are simultaneously realized
in a single nonlinear crystal in order to generate three strongly
correlated optical fields. By combining together the outputs of two of
the three detectors measuring intensities of the generated fields, we
obtain the joint photocount statistics between the single field and the
sum of the other two. We apply a microscopic quantum theory developed
earlier to determine the joint photon-number distribution and the joint
quasi-distributions of integrated intensities and prove nonclassical
nature of the three-mode state. Finally, by performing a conditional
measurement on the single field, we obtain a state endowed with a
sub-Poissonian statistics, as testified by the analysis of the
conditional Fano factor. The role of quantum detection efficiencies in
this conditional state-preparation method is discussed in detail.,
DOI = 10.1140/epjd/e2009-00136-3,
ISSN = 1434-6060,
Unique-ID = ISI:000266566600014,
2008
J. Perina and J. Krepelka, „Joint probability distributions of stimulated parametric down-conversion
for controllable nonclassical fluctuations,“ OPTICS COMMUNICATIONS, vol. 281, iss. 18, pp. 4705-4711, 2008.
[Bibtex]
@article ISI:000259069800028,
Author = Perina, Jan and Krepelka, Jaromir,
Title = Joint probability distributions of stimulated parametric down-conversion
for controllable nonclassical fluctuations,
Journal = OPTICS COMMUNICATIONS,
Year = 2008,
Volume = 281,
Number = 18,
Pages = 4705-4711,
Month = SEP 15,
Abstract = We derive and illustrate multimode joint photon-number distributions,
integrated-intensity distributions, sum- and difference-distributions
and conditional distributions for stimulated parametric down-conversion
on the basis of exact formulae. The stimulated process can increase or
decrease nonclassical fluctuations from spontaneous process and it can
be used to control quantum noise. The description is suitable for
interpretation of experimental data. (C) 2008 Elsevier B.V. All rights
reserved.,
DOI = 10.1016/j.optcom.2008.06.007,
ISSN = 0030-4018,
Unique-ID = ISI:000259069800028,
M. Bondani, A. Allevi, G. Zambra, A. Andreoni, J. Perina, J. Krepelka, and J. Perina Jr., „Experimental demonstration of sub-shot-noise intensity correlations in
an intense twin beam,“ EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS, vol. 160, pp. 33-41, 2008.
[Bibtex]
@article ISI:000256930600005,
Author = Bondani, M. and Allevi, A. and Zambra, G. and Andreoni, A. and Perina,
J. and Krepelka, J. and Perina, Jr., J.,
Title = Experimental demonstration of sub-shot-noise intensity correlations in
an intense twin beam,
Journal = EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS,
Year = 2008,
Volume = 160,
Pages = 33-41,
Month = JUL,
Note = 14th Central European Workshop on Quantum Optics, Palermo, ITALY, JUN
01-05, 2007,
Abstract = Twin-beam states of light produced by spontaneous parametric
downconversion are endowed with sub-shot-noise photon-number
correlations at any intensity regime. We have demonstrated
sub-shot-noise photon-number correlations in a ps-pulsed intense (more
than 1000 photons) twin beam by measuring the variance of the difference
in the number of photons detected in the two outputs of the crystal. The
variance is 3.25 dB below the shot-noise level. Measurements show that
detection of sub-shot-noise correlation requires a careful selection of
twin coherence areas and that these areas depend on the pump intensity.,
DOI = 10.1140/epjst/e2008-00707-x,
ISSN = 1951-6355,
Unique-ID = ISI:000256930600005,
J. Perina and J. Krepelka, „Joint distributions of multimode stimulated parametric down-conversion
and controllable nonclassical effects,“ JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, vol. 41, iss. 8, 2008.
[Bibtex]
@article ISI:000254779000025,
Author = Perina, Jan and Krepelka, Jaromir,
Title = Joint distributions of multimode stimulated parametric down-conversion
and controllable nonclassical effects,
Journal = JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS,
Year = 2008,
Volume = 41,
Number = 8,
Month = APR 28,
Abstract = Based on recent results (Perina and Krepelka 2006 Opt. Commun. 265 632)
we derive and illustrate multimode joint photon-number distributions,
integrated-intensity distributions, sum and difference distributions and
conditional distributions for stimulated parametric down-conversion in
the approximation of large degrees of freedom. The stimulated process
can increase or decrease nonclassical effects from spontaneous processes
and it can be used to control them.,
DOI = 10.1088/0953-4075/41/8/085501,
Article-Number = 085501,
ISSN = 0953-4075,
Unique-ID = ISI:000254779000025,
J. Perina Jr., J. Perina, O. Haderka, J. Krepelka, M. Hamar, V. Michalek, M. Bondani, A. Allevi, and A. Andreoni, „Photocount measurements as a tool for investigation of non-classical
properties of twin beams,“ in 16TH POLISH-SLOVAK-CZECH OPTICAL CONFERENCE ON WAVE AND QUANTUM ASPECTS
OF CONTEMPORARY OPTICS, 2008.
[Bibtex]
@inproceedings ISI:000299090100004,
Author = Perina, Jr., Jan and Perina, Jan and Haderka, Ondrej and Krepelka,
Jaromir and Hamar, Martin and Michalek, Vaclav and Bondani, Maria and
Allevi, Alessia and Andreoni, Alessandra,
Editor = PopiolekMasajada, A and Jankowska, E and Urbanczyk, W,
Title = Photocount measurements as a tool for investigation of non-classical
properties of twin beams,
Booktitle = 16TH POLISH-SLOVAK-CZECH OPTICAL CONFERENCE ON WAVE AND QUANTUM ASPECTS
OF CONTEMPORARY OPTICS,
Series = Proceedings of SPIE,
Year = 2008,
Volume = 7141,
Note = 16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects
of Contemporary Optics, Polanica Zdroj, POLAND, SEP 08-12, 2008,
Organization = Wroclaw Univ Technol, Inst Phys,
Abstract = Joint signal-idler photoelectron distributions of twin beams have been
measured recently in two distinct regimes: either the mean number of
photon pairs per one pump pulse is lower that the number of independent
modes or vice versa. Exploiting a microscopic quantum theory for joint
quasi-distributions in parametric down-conversion based on the model of
superposition of signal and noise we characterize properties of twin
beams in terms of quasi-distributions using experimental data. In
parallel to the microscopic model, joint signal-idler photon-number
distribution is reconstructed using the method of maximum likelihood.
Negative values as well as oscillating behavior in quantum region are
characteristic for the joint signal-idler quasi-distributions of
integrated intensities. The larger the mean number of photon pairs per
mode the weaker the quantum features are. However, they survive even in
the mesoscopic regime, i.e. when tens of photon pairs per mode are
present on average. Also the conditional and difference photon-number
distributions are shown to be sub-Poissonian and sub-shot-noise,
respectively. Violation of classical inequalities for photon-number
distributions is discussed.,
DOI = 10.1117/12.822349,
Article-Number = 714104,
ISSN = 0277-786X,
ISBN = 978-0-8194-7383-7,
Unique-ID = ISI:000299090100004,
2007
J. Perina, J. Krepelka, J. Perina Jr., M. Bondani, A. Allevi, and A. Andreoni, „Experimental joint signal-idler quasidistributions and photon-number
statistics for mesoscopic twin beams,“ PHYSICAL REVIEW A, vol. 76, iss. 4, 2007.
[Bibtex]
@article ISI:000250619700175,
Author = Perina, Jan and Krepelka, Jaromir and Perina, Jr., Jan and Bondani,
Maria and Allevi, Alessia and Andreoni, Alessandra,
Title = Experimental joint signal-idler quasidistributions and photon-number
statistics for mesoscopic twin beams,
Journal = PHYSICAL REVIEW A,
Year = 2007,
Volume = 76,
Number = 4,
Month = OCT,
Abstract = Joint signal-idler photoelectron distributions of twin beams containing
several tens of photons per mode have been measured recently. Exploiting
a microscopic quantum theory for joint quasidistributions in parametric
down-conversion developed earlier we characterize properties of twin
beams in terms of quasidistributions using experimental data. Negative
values as well as oscillating behavior in the quantum region are
characteristic for the subsequently determined joint signal-idler
quasidistributions of integrated intensities. Also the conditional and
difference photon-number distributions are shown to be sub-Poissonian
and sub-shot-noise, respectively.,
DOI = 10.1103/PhysRevA.76.043806,
Article-Number = 043806,
ISSN = 1050-2947,
Unique-ID = ISI:000250619700175,
2006
J. Perina and J. Krepelka, „Multimode description of stimulated parametric down-conversion,“ OPTICS COMMUNICATIONS, vol. 265, iss. 2, pp. 632-641, 2006.
[Bibtex]
@article ISI:000240819300040,
Author = Perina, Jan and Krepelka, Jaromir,
Title = Multimode description of stimulated parametric down-conversion,
Journal = OPTICS COMMUNICATIONS,
Year = 2006,
Volume = 265,
Number = 2,
Pages = 632-641,
Month = SEP 15,
Abstract = We derive multimode generating functions, photon-number distributions,
integrated-intensity distributions, moments and quadrature fluctuations
for stimulated parametric down-conversion in relation to experiments
measuring joint distributions. The border between classical and quantum
behaviour is given. (c) 2006 Elsevier B.V. All rights reserved.,
DOI = 10.1016/j.optcom.2006.04.009,
ISSN = 0030-4018,
Unique-ID = ISI:000240819300040,
M. Abdalla, J. Perina, and J. Krepelka, „Statistical properties of multiphoton time-dependent three-boson coupled
oscillators,“ JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, vol. 23, iss. 6, pp. 1146-1160, 2006.
[Bibtex]
@article ISI:000238372900019,
Author = Abdalla, MS and Perina, J and Krepelka, J,
Title = Statistical properties of multiphoton time-dependent three-boson coupled
oscillators,
Journal = JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS,
Year = 2006,
Volume = 23,
Number = 6,
Pages = 1146-1160,
Month = JUN,
Abstract = We investigate the quantum statistics of three time-dependent coupled
oscillators in the presence of multiphoton processes. The system is
connected with the two-atom multiphoton Tavis-Cummings model. The
solution of the Heisenberg equations of the motion is obtained in a
compact form. We assume that the modes are initially prepared in
coherent states, and we discuss nonclassical phenomena (squeezing and
sub-Poissonian behavior). Further, we examine the joint
quasi-distribution functions as well as photon-number distribution and
its factorial moments. The system has shown that the nonclassical effect
is apparent in compound modes (1, 3) and (2,3). Moreover, the
superstructure phenomenon is observed when the photon transition is
increased. (c) 2006 Optical Society of America.,
DOI = 10.1364/JOSAB.23.001146,
ISSN = 0740-3224,
Unique-ID = ISI:000238372900019,
V. Perinova, A. Luks, and J. Krepelka, „States of the optimum Fisher measure of information for quantum
interferometry,“ PHYSICAL REVIEW A, vol. 73, iss. 6, 2006.
[Bibtex]
@article ISI:000238694900159,
Author = Perinova, V and Luks, A and Krepelka, J,
Title = States of the optimum Fisher measure of information for quantum
interferometry,
Journal = PHYSICAL REVIEW A,
Year = 2006,
Volume = 73,
Number = 6,
Month = JUN,
Abstract = Fisher's measure of information is compared to the usual measure of
sensitivity of the SU(2) and SU(1,1) interferometers. The states of
optimum Fisher information measure and prescribed mean photon-number
difference are defined, and the properties of these states are studied
in the SU(2) interferometer.,
DOI = 10.1103/PhysRevA.73.063807,
Article-Number = 063807,
ISSN = 1050-2947,
Unique-ID = ISI:000238694900159,
V. Perinova, A. Luks, and J. Krepelka, „Linear coupling, loss and gain of counterpropagating beams,“ JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, vol. 39, iss. 9, pp. 2267-2284, 2006.
[Bibtex]
@article ISI:000238319900015,
Author = Perinova, V and Luks, A and Krepelka, J,
Title = Linear coupling, loss and gain of counterpropagating beams,
Journal = JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS,
Year = 2006,
Volume = 39,
Number = 9,
Pages = 2267-2284,
Month = MAY 14,
Abstract = We investigate counterpropagation of the two-mode input state in a
corrugated waveguide, which reproduces a photonic band-gap structure.
First assuming a gain medium, we model a distributed feedback laser as
an amplifier. From this case we pass to the attenuator, which
corresponds to a lossy medium. We determine the transmission and
fidelity spectra for the waveguide in the dependence on a mismatch
coefficient and a measure of losses.,
DOI = 10.1088/0953-4075/39/9/012,
ISSN = 0953-4075,
Unique-ID = ISI:000238319900015,
J. Perina and J. Krepelka, „Joint probability distributions for optical parametric down-conversion,“ JOURNAL OF THE EUROPEAN OPTICAL SOCIETY-RAPID PUBLICATIONS, vol. 1, 2006.
[Bibtex]
@article ISI:000206312700005,
Author = Perina, Jan and Krepelka, Jaromir,
Title = Joint probability distributions for optical parametric down-conversion,
Journal = JOURNAL OF THE EUROPEAN OPTICAL SOCIETY-RAPID PUBLICATIONS,
Year = 2006,
Volume = 1,
Abstract = We derive multi mode joint generating functions, photon-number
distributions, integrated-intensity distributions and related quantities
for spontaneous and stimulated parametric down-conversion in relation to
experiments. [DOI:10.2971/jeos.2006.06002],
DOI = 10.2971/jeos.2006.06002,
Article-Number = 06002,
ISSN = 1990-2573,
Unique-ID = ISI:000206312700005,
2005
J. Perina and J. Krepelka, „Multimode description of spontaneous parametric down-conversion,“ JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS, vol. 7, iss. 9, pp. 246-252, 2005.
[Bibtex]
@article ISI:000232513300003,
Author = Perina, J and Krepelka, J,
Title = Multimode description of spontaneous parametric down-conversion,
Journal = JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS,
Year = 2005,
Volume = 7,
Number = 9,
Pages = 246-252,
Month = SEP,
Abstract = We derive the multimode generating function, joint photon-number
distribution and joint integrated-intensity distribution for spontaneous
parametric down-conversion in relation to measured experimental data.,
DOI = 10.1088/1464-4266/7/9/003,
ISSN = 1464-4266,
Unique-ID = ISI:000232513300003,
2004
A. Luks, V. Perinova, and J. Krepelka, „Measurements that little disturb the switching of light,“ JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS, vol. 6, iss. 6, SI, pp. S549-S555, 2004.
[Bibtex]
@article ISI:000222591700014,
Author = Luks, A and Perinova, V and Krepelka, J,
Title = Measurements that little disturb the switching of light,
Journal = JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS,
Year = 2004,
Volume = 6,
Number = 6, SI,
Pages = S549-S555,
Month = JUN,
Abstract = We have found traditional statistics for two disjoint time intervals of
a measurement that little disturbs the dynamics of a two-level system.
The second-quantized formulation has partly been restored for models
where the two-level system is a photon.,
DOI = 10.1088/1464-4266/6/6/013,
ISSN = 1464-4266,
Unique-ID = ISI:000222591700014,
V. Perinova, A. Luks, and J. Krepelka, „Quantum and semiclassical models for a random laser,“ JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS, vol. 6, iss. 3, SI, pp. S104-S110, 2004.
[Bibtex]
@article ISI:000220821500018,
Author = Perinova, V and Luks, A and Krepelka, J,
Title = Quantum and semiclassical models for a random laser,
Journal = JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS,
Year = 2004,
Volume = 6,
Number = 3, SI,
Pages = S104-S110,
Month = MAR,
Note = 10th Central European Workshop on Quantum Optics, Rostock Warnemunde,
GERMANY, APR 04-07, 2003,
Abstract = Without attempting a first-principles approach, we have formulated a
quantum model consistent with the semiclassical one for a random laser.
Invoking the open systems theory, we have refined the formulae for the
scaled Fano factors, both total and single mode.,
DOI = 10.1088/1464-4266/6/3/017,
ISSN = 1464-4266,
Unique-ID = ISI:000220821500018,
2003
V. Perinova, A. Luks, and J. Krepelka, „From `coupled harmonic oscillators’ back to interacting fields,“ JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS, vol. 5, iss. 3, pp. 254-261, 2003.
[Bibtex]
@article ISI:000184059400011,
Author = Perinova, V and Luks, A and Krepelka, J,
Title = From `coupled harmonic oscillators' back to interacting fields,
Journal = JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS,
Year = 2003,
Volume = 5,
Number = 3,
Pages = 254-261,
Month = JUN,
Abstract = We compare the original formalism in which the travelling-wave setup of
the experiment due to Zou et al (1991 Phys. Rev. Lett. 67 318) was
analysed with a simple quantum optical approach that was later used for
the same purpose. The analyses, both original and subsequent, included
the quantum correlation between the signal beams. Whereas the original
work spoke of a single photon per beam, the subsequent papers
generalized to many photons per mode. We try to show that, in the
original theory as well, one may speak of many photons per beam, without
changing the relationship with the experiment. We conclude that the
original analysis represents multiphoton stationary fields by interval
restrictions comprising single photons.,
DOI = 10.1088/1464-4266/5/3/309,
ISSN = 1464-4266,
Unique-ID = ISI:000184059400011,
K. Thun, J. Perina, and J. Krepelka, „Quantum Zeno effect in Raman scattering,“ in 13TH POLISH-CZECH-SLOVAK CONFERENCE ON WAVE AND QUANTUM ASPECTS OF
CONTEMPORARY OPTICS, 2003, pp. 1-6.
[Bibtex]
@inproceedings ISI:000188596600001,
Author = Thun, K and Perina, J and Krepelka, J,
Editor = Zajac, M and Masajada, J,
Title = Quantum Zeno effect in Raman scattering,
Booktitle = 13TH POLISH-CZECH-SLOVAK CONFERENCE ON WAVE AND QUANTUM ASPECTS OF
CONTEMPORARY OPTICS,
Series = PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE),
Year = 2003,
Volume = 5259,
Pages = 1-6,
Note = 13th Polish-Czech-Slovak Conference on Wave and Quantum Aspects of
Contemporary Optics, KRZYZOWA, POLAND, SEP 09-13, 2002,
Organization = Wroclaw Univ Technol, Inst Phys; Wroclaw Univ Technol Rector; SPIE; SPIE
Poland Chapter,
Abstract = Zeno and inverse Zeno effects are demonstrated in Raman (Brillouin)
scattering of strong coherent as well as quantum pump beams including
phase mismatches. Raman coupler is used to control optical beams
involved by means of a linear waveguide.,
DOI = 10.1117/12.545049,
ISSN = 0277-786X,
ISBN = 0-8194-5146-0,
Unique-ID = ISI:000188596600001,
2002
K. Thun, J. Perina, and J. Krepelka, „Quantum Zeno effect in Raman scattering,“ PHYSICS LETTERS A, vol. 299, iss. 1, pp. 19-30, 2002.
[Bibtex]
@article ISI:000176725600004,
Author = Thun, K and Perina, J and Krepelka, J,
Title = Quantum Zeno effect in Raman scattering,
Journal = PHYSICS LETTERS A,
Year = 2002,
Volume = 299,
Number = 1,
Pages = 19-30,
Month = JUN 24,
Abstract = Zeno and inverse Zeno effects are demonstrated in Raman (Brillouin)
scattering of strong coherent as well as quantum pump beams including
phase mismatches. Raman coupler is used to control optical beams
involved by means of a linear waveguide. (C) 2002 Elsevier Science B.V.
All rights reserved.,
DOI = 10.1016/S0375-9601(02)00629-1,
ISSN = 0375-9601,
Unique-ID = ISI:000176725600004,
V. Perinova, A. Luks, and J. Krepelka, „Doubly parametrically amplifying „coupler“ in spontaneous regime,“ in FIRST INTERNATIONAL WORKSHOP ON CLASSICAL AND QUANTUM INTERFERENCE, 2002, pp. 121-129.
[Bibtex]
@inproceedings ISI:000178162200013,
Author = Perinova, V and Luks, A and Krepelka, J,
Editor = Perina, J and Hrabovsky, M and Krepelka, J,
Title = Doubly parametrically amplifying ``coupler'' in spontaneous regime,
Booktitle = FIRST INTERNATIONAL WORKSHOP ON CLASSICAL AND QUANTUM INTERFERENCE,
Series = PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE),
Year = 2002,
Volume = 4888,
Pages = 121-129,
Note = 1st International Workshop on Classical Quantum Interference, OLOMOUC,
CZECH REPUBLIC, OCT 25-26, 2001,
Organization = Res Ctr Opt; Palacky Univ; Acad Sci Czech Republ, Inst Phys; SPIE,
Abstract = We consider the arrangement of two down-conversion crystals with
parallel rather than usual serial alignment, which are so close together
that a linear energy exchange, for example by means of evanescent waves,
is possible. We examine conditions under which the signal beams are
mutually coherent.,
DOI = 10.1117/12.475876,
ISSN = 0277-786X,
ISBN = 0-8194-4670-X,
Unique-ID = ISI:000178162200013,
2001
P. Schovanek, J. Krepelka, M. Hrabovsky, M. Palatka, M. Vlcek, L. Soukup, L. Jastrabik, J. Ridky, J. Grygar, and M. Bohacova, „Optical filters designed for the fluorescence detector of the AUGER
project with transmittance in the range 300 nm-420 nm,“ in 12TH CZECH-SLOVAK-POLISH OPTICAL CONFERENCE ON WAVE AND QUANTUM ASPECTS
OF CONTEMPORARY OPTICS, 2001, pp. 213-216.
[Bibtex]
@inproceedings ISI:000169323500030,
Author = Schovanek, P and Krepelka, J and Hrabovsky, M and Palatka, M and Vlcek,
M and Soukup, L and Jastrabik, L and Ridky, J and Grygar, J and
Bohacova, M,
Editor = Perina, J and Hrabovsky, M and Krepelka, J,
Title = Optical filters designed for the fluorescence detector of the AUGER
project with transmittance in the range 300 nm-420 nm,
Booktitle = 12TH CZECH-SLOVAK-POLISH OPTICAL CONFERENCE ON WAVE AND QUANTUM ASPECTS
OF CONTEMPORARY OPTICS,
Series = PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
(SPIE),
Year = 2001,
Volume = 4356,
Pages = 213-216,
Note = 12th Czech-Slovak-Polish Optical Conference on Wave and Quantum Aspects
of Contemporary Optics, VELKE LOSINY, CZECH REPUBLIC, SEP 12-15, 2000,
Organization = SPIE Czech \& Slovak Chapter; Acad Sci Czech Republ, Palacky Univ \&
Inst Phys; Palacky Univ, Dept Opt,
Abstract = The fluorescence detector, a component of the AUGER project, is designed
to observe fluorescent light generated in interactions of high energy
cosmic rays with nitrogen atoms in the Earth's atmosphere. This article
presents several designs of optical filters transmitting in the range
300 nn - 420 nm, where the fluorescent light is emitted. Two approaches
are proposed - a system of thin dielectric layers and a combination of
suitable glass plates. Quality of different filters is determined
according to the value of transmittance in the required wavelength
range, the shape of the transmittance curve at the edge of the
transmitting window, long-term stability as well as feasibility and cost
of their mass production. Selected types of filters were prepared, their
parameters measured and compared with predicted values.,
DOI = 10.1117/12.417831,
ISSN = 0277-786X,
ISBN = 0-8194-4047-7,
Unique-ID = ISI:000169323500030,
2000
V. Perinova, A. Luks, J. Krepelka, and V. Jelinek, „Number-phase properties of correlated chaotic fields,“ JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS, vol. 2, iss. 6, pp. 746-757, 2000.
[Bibtex]
@article ISI:000166239300009,
Author = Perinova, V and Luks, A and Krepelka, J and Jelinek, V,
Title = Number-phase properties of correlated chaotic fields,
Journal = JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS,
Year = 2000,
Volume = 2,
Number = 6,
Pages = 746-757,
Month = DEC,
Abstract = We study the arrangement of two down-conversion crystals with aligned
and partially aligned idler beams in the quasimonochromatic
approximation. Treating the signal fields as correlated chaotic modes,
we arrive at a detailed description and illustration of their
mathematically well defined state in terms of number and phase
properties. We show it to be a mixed partial phase-difference state. We
derive the closed formulae for the phase-difference distributions in
this state derived from the phase-space distributions related to the
normal, symmetrical and antinormal orderings of field operators and show
that such distributions depend exclusively on measures of correlation
which are variants of the modulus of the familiar degree of coherence.
Quantum correlation influences fluctuations of photon-number sum,
photon-number difference and quantum phase difference. Starting from a
quasidistribution which carries the same information as the statistical
operator, we arrive at the joint distributions of number sum and phase
difference and the quasidistribution of number difference and phase
difference.,
DOI = 10.1088/1464-4266/2/6/306,
ISSN = 1464-4266,
Unique-ID = ISI:000166239300009,
counts,“ PHYSICAL REVIEW A, vol. 62, iss. 3, pp. art. no.-033806, 2000.
[Bibtex]
@article ISI:000089255400085,
Author = Luks, A and Perinova, V and Krepelka, J,
Title = Continuous measurement of photon number with double registration of
counts,
Journal = PHYSICAL REVIEW A,
Year = 2000,
Volume = 62,
Number = 3,
Pages = art. no.-033806,
Month = SEP,
Abstract = The theory of continuous measurement has been applied to photon counting
by means of an atomic beam crossing a cavity and impinging on a
field-ionization detector behind. An interesting feature of the proposed
measurement consists in an incoherent frequency down-conversion coupling
of the measured mode to another mode, which, on the assumption that the
latter is initially in the vacuum state, results in a second
registration of the counts.,
ISSN = 1050-2947,
Unique-ID = ISI:000089255400085,
V. Perinova, A. Luks, and J. Krepelka, „Intelligent states in SU(2) and SU(1,1) interferometry,“ JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS, vol. 2, iss. 2, pp. 81-89, 2000.
[Bibtex]
@article ISI:000089908800005,
Author = Perinova, V and Luks, A and Krepelka, J,
Title = Intelligent states in SU(2) and SU(1,1) interferometry,
Journal = JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS,
Year = 2000,
Volume = 2,
Number = 2,
Pages = 81-89,
Month = APR,
Abstract = The experimentally feasible SU(2) and SU(1, 1) intelligent states are
studied for the parameter values leading to the crescent topography of
their quasidistributions. Such states increase the sensitivity of the
interferometric measurement based on the photon-number difference and
photon-number sum detections.,
DOI = 10.1088/1464-4266/2/2/303,
ISSN = 1464-4266,
Unique-ID = ISI:000089908800005,
1999
J. Fiurasek, J. Krepelka, and J. Perina, „Quantum-phase properties of the Kerr couplers,“ OPTICS COMMUNICATIONS, vol. 167, iss. 1-6, pp. 115-124, 1999.
[Bibtex]
@article ISI:000082100300018,
Author = Fiurasek, J and Krepelka, J and Perina, J,
Title = Quantum-phase properties of the Kerr couplers,
Journal = OPTICS COMMUNICATIONS,
Year = 1999,
Volume = 167,
Number = 1-6,
Pages = 115-124,
Month = AUG 15,
Abstract = We use the concept of phase space and Husimi quasidistribution to derive
joint-phase probability distribution and quantum-phase properties for
the Kerr couplers. The exact numerical as well as approximate analytical
solutions of the Schrodinger equation are found. The spatial development
of the single-mode phase distributions and phase-difference distribution
is demonstrated. The Fourier coefficients of the phase distributions are
introduced and employed to describe quantum-phase behaviour, It is shown
that the phase-difference evolution is closely connected to an energy
exchange between two waveguides, which form the coupler. The collapses
and revivals of the mean photon number oscillations are due to the
bifurcation of the phase-difference probability distribution, which has
a two-fold symmetry in the interval of collapse. (C) 1999 Elsevier
Science B.V. All rights reserved.,
DOI = 10.1016/S0030-4018(99)00286-2,
ISSN = 0030-4018,
Unique-ID = ISI:000082100300018,
[Bibtex]
@article ISI:000081597300027,
Author = Fiurasek, J and Krepelka, J and Perina, J,
Title = Quantum phase properties of Kerr couplers,
Journal = ACTA PHYSICA SLOVACA,
Year = 1999,
Volume = 49,
Number = 4,
Pages = 689-694,
Month = AUG,
Abstract = We use the concept of the phase space and the Husimi quasidistribution
to study quantum phase properties of the optical fields propagating in
Kerr couplers. Fourier coefficients of the phase distributions are
introduced and utilized to examine their spatial development. The
collapses and revivals of the mean photon number oscillations between
the two waveguides are due to the bifurcation of the phase-difference
probability distribution, which has a twofold symmetry in the interval
of collapse.,
ISSN = 0323-0465,
Unique-ID = ISI:000081597300027,
V. Perinova, A. Luks, and J. Krepelka, „Quasidistributions for noncommuting cosine and sine operators,“ EUROPEAN PHYSICAL JOURNAL D, vol. 5, iss. 3, pp. 417-432, 1999.
[Bibtex]
@article ISI:000079002700015,
Author = Perinova, V and Luks, A and Krepelka, J,
Title = Quasidistributions for noncommuting cosine and sine operators,
Journal = EUROPEAN PHYSICAL JOURNAL D,
Year = 1999,
Volume = 5,
Number = 3,
Pages = 417-432,
Month = MAR,
Abstract = A similarity between the photon annihilation and creation operators and
the Susskind-Glogower exponential phase operators motivates the
introduction and study of quasidistributions of the cosine and sine of
phase. These quasidistributions are related to the standard and
antistandard orderings of trigonometric phase operators and to the
normal: antinormal, and symmetrical orderings of the exponential phase
operators. The symmetrical ordering is connected to an optical ideal
tomography of the appropriate quasidistribution from the rotated
Susskind-Glogower cosine operator.,
DOI = 10.1007/s100530050274,
ISSN = 1434-6060,
Unique-ID = ISI:000079002700015,
1998
V. Perinova, A. Luks, and J. Krepelka, „Quantum phase properties impeded second-harmonic generation,“ QUANTUM AND SEMICLASSICAL OPTICS, vol. 10, iss. 2, pp. 375-408, 1998.
[Bibtex]
@article ISI:000073328400011,
Author = Perinova, V and Luks, A and Krepelka, J,
Title = Quantum phase properties impeded second-harmonic generation,
Journal = QUANTUM AND SEMICLASSICAL OPTICS,
Year = 1998,
Volume = 10,
Number = 2,
Pages = 375-408,
Month = APR,
Abstract = Using the statistical characteristics of the photon number, quantum
phase and field quadratures, based on the preferred phase, we have
demonstrated a Kerr-like behaviour for the cascaded second-order
nonlinearities and have studied thoroughly the oscillations superimposed
on the Kerr-like trend for an input coherent state. We have performed a
global study over the entire quantum period in an idealized model of the
trend of this process based on the lossless Kerr progression.,
DOI = 10.1088/1355-5111/10/2/011,
ISSN = 1355-5111,
Unique-ID = ISI:000073328400011,
1997
V. Perinova, A. Luks, and J. Krepelka, „Quasiprobability distribution for the photon-number operator and
quadrature operator in a coherent state,“ QUANTUM AND SEMICLASSICAL OPTICS, vol. 9, iss. 6, pp. 995-1016, 1997.
[Bibtex]
@article ISI:000071099100012,
Author = Perinova, V and Luks, A and Krepelka, J,
Title = Quasiprobability distribution for the photon-number operator and
quadrature operator in a coherent state,
Journal = QUANTUM AND SEMICLASSICAL OPTICS,
Year = 1997,
Volume = 9,
Number = 6,
Pages = 995-1016,
Month = DEC,
Abstract = Quasiprobability distributions of the photon number and the
momentum-like quadrature appropriate to partial symmetrizations of
products of the photon-number and quadrature operators allowing these
operators to alternate at most (2r - 2) times are good approximations to
the Wigner function for these simultaneously considered noncommuting
quantities related to the fully symmetric ordering. It is shown that the
r-parametrized quasiprobability distributions must take on values at
multiples of 1/r. A scheme for simultaneous measurement of the photon
number and the momentum-like quadrature is proposed. The r-parametrized
quasidistributions can be compared with a joint distribution of the
photon number and the momentum-like quadrature measured simultaneously.,
DOI = 10.1088/1355-5111/9/6/012,
ISSN = 1355-5111,
Unique-ID = ISI:000071099100012,
V. Perinova, A. Luks, and J. Krepelka, „Preferred values and phase dispersions of any order for l-photon Kerr
states,“ QUANTUM AND SEMICLASSICAL OPTICS, vol. 9, iss. 3, pp. 465-488, 1997.
[Bibtex]
@article ISI:A1997XE20600014,
Author = Perinova, V and Luks, A and Krepelka, J,
Title = Preferred values and phase dispersions of any order for l-photon Kerr
states,
Journal = QUANTUM AND SEMICLASSICAL OPTICS,
Year = 1997,
Volume = 9,
Number = 3,
Pages = 465-488,
Month = JUN,
Abstract = The superposition states emerging from initial l-photon coherent states
during a lossless Kerr evolution have been studied. Usual and
higher-order phase characteristics well suited to the deteriorated phase
properties of initial and evolved states have been utilized.,
DOI = 10.1088/1355-5111/9/3/014,
ISSN = 1355-5111,
Unique-ID = ISI:A1997XE20600014,
1996
V. Perinova, A. Luks, and J. Krepelka, „Conditional generation of special states using continuous measurements,“ PHYSICAL REVIEW A, vol. 54, iss. 1, pp. 821-842, 1996.
[Bibtex]
@article ISI:A1996UX03400095,
Author = Perinova, V and Luks, A and Krepelka, J,
Title = Conditional generation of special states using continuous measurements,
Journal = PHYSICAL REVIEW A,
Year = 1996,
Volume = 54,
Number = 1,
Pages = 821-842,
Month = JUL,
Abstract = The theory of continuous measurement of the photon number has been
applied to a two-mode light field and it has been assumed that the
second mode is being measured. An entanglement of the two-mode state has
been supposed. The destructive and nondemolition continuous
photon-number measurements have been compared according to their
response in the first mode to the parameters of the quantum correlation
and the detection time.,
DOI = 10.1103/PhysRevA.54.821,
ISSN = 1050-2947,
Unique-ID = ISI:A1996UX03400095,
V. Perinova, A. Luks, and J. Krepelka, „Ideal and destructive state reductions of correlated light fields and
the continuous measurement of photon number,“ PHYSICAL REVIEW A, vol. 53, iss. 1, pp. 525-542, 1996.
[Bibtex]
@article ISI:A1996TR75000064,
Author = Perinova, V and Luks, A and Krepelka, J,
Title = Ideal and destructive state reductions of correlated light fields and
the continuous measurement of photon number,
Journal = PHYSICAL REVIEW A,
Year = 1996,
Volume = 53,
Number = 1,
Pages = 525-542,
Month = JAN,
Abstract = A continuous photon-number measurement has been assumed in the idler
mode output from parametric down-conversion for an initial coherent
state. The states generated in the signal mode due to the mode
entanglement and the effects of both the destructive and the ideal
reduction are described in terms of a quasidistribution of the complex
field amplitude as well as of the density-matrix elements. The resulting
near-number states in the ideal case are suitable for the study of the
dynamics of phase and quadrature distributions rotated by the actual
preferred phase. These states exhibit both number and quadrature
squeezing.,
DOI = 10.1103/PhysRevA.53.525,
ISSN = 1050-2947,
Unique-ID = ISI:A1996TR75000064,
V. Perinova, A. Luks, J. Krepelka, C. Sibilia, and M. Bertolotti, „Quantum phase properties of a cubically behaved second-order nonlinear
medium,“ JOURNAL OF MODERN OPTICS, vol. 43, iss. 1, pp. 13-38, 1996.
[Bibtex]
@article ISI:A1996TW14700003,
Author = Perinova, V and Luks, A and Krepelka, J and Sibilia, C and Bertolotti, M,
Title = Quantum phase properties of a cubically behaved second-order nonlinear
medium,
Journal = JOURNAL OF MODERN OPTICS,
Year = 1996,
Volume = 43,
Number = 1,
Pages = 13-38,
Month = JAN,
Abstract = The travelling-wave second-harmonic generation can be studied in the
cases of co- and contradirectional propagations provided that in the
contradirectional case an approximative Heisenberg picture is accepted.
Selected statistics makes evident the squeezing property and the
Kerr-type behaviour in the fundamental mode.,
DOI = 10.1080/095003496156327,
ISSN = 0950-0340,
Unique-ID = ISI:A1996TW14700003,
1994
A. LUKS, V. PERINOVA, and J. KREPELKA, „STATE REDUCTION FOR CORRELATED PHOTONS AND EIGENSTATES OF UNITARILY AND
NON-UNITARILY DISPLACED NUMBER OPERATOR,“ JOURNAL OF MODERN OPTICS, vol. 41, iss. 12, pp. 2325-2341, 1994.
[Bibtex]
@article ISI:A1994QD47300009,
Author = LUKS, A and PERINOVA, V and KREPELKA, J,
Title = STATE REDUCTION FOR CORRELATED PHOTONS AND EIGENSTATES OF UNITARILY AND
NON-UNITARILY DISPLACED NUMBER OPERATOR,
Journal = JOURNAL OF MODERN OPTICS,
Year = 1994,
Volume = 41,
Number = 12,
Pages = 2325-2341,
Month = DEC,
Abstract = The number-quadrature minimum-uncertainty states after rotation and
displacement emerge in the parametric down-conversion followed by photon
number measurement in the idler mode when the coherent state inputs.
Again, the state generated in the signal mode by the reduction is
described by the principally measurable quantum-statistical tools.,
DOI = 10.1080/09500349414552181,
ISSN = 0950-0340,
Unique-ID = ISI:A1994QD47300009,
A. LUKS, V. PERINOVA, and J. KREPELKA, „ROTATION ANGLE, PHASES OF OSCILLATORS WITH DEFINITE CIRCULAR
POLARIZATIONS, AND THE COMPOSITE IDEAL PHASE OPERATOR,“ PHYSICAL REVIEW A, vol. 50, iss. 1, pp. 818-830, 1994.
[Bibtex]
@article ISI:A1994NX00100099,
Author = LUKS, A and PERINOVA, V and KREPELKA, J,
Title = ROTATION ANGLE, PHASES OF OSCILLATORS WITH DEFINITE CIRCULAR
POLARIZATIONS, AND THE COMPOSITE IDEAL PHASE OPERATOR,
Journal = PHYSICAL REVIEW A,
Year = 1994,
Volume = 50,
Number = 1,
Pages = 818-830,
Month = JUL,
Abstract = The exposition of the formalisms of the quantum optical phase has been
provided commencing from the quantum mechanics of a massive particle.
The clockwise and counterclockwise components of the planar motion are
shown to correspond to the signal and idler modes in the heterodyne
detection scheme. The appropriate ideal phase proposal has been embodied
in this scheme.,
DOI = 10.1103/PhysRevA.50.818,
ISSN = 1050-2947,
Unique-ID = ISI:A1994NX00100099,
[Bibtex]
@article ISI:A1994PC96000007,
Author = PERINOVA, V and LUKS, A and KREPELKA, J,
Title = QUANTUM STATISTICS OF NUMBER-QUADRATURE MINIMUM UNCERTAINTY STATES,
Journal = LASER PHYSICS,
Year = 1994,
Volume = 4,
Number = 4,
Pages = 717-725,
Month = JUL-AUG,
Abstract = The number-quadrature minimum uncertainty states are related to the
study of number squeezing and quadrature squeezing because the
commutator of the possibly simultaneously measured operators is the
conjugate quadrature operator. The role of phase squeezing is pointed
out.,
ISSN = 1054-660X,
Unique-ID = ISI:A1994PC96000007,
1993
V. PERINOVA and J. KREPELKA, „FREE AND DISSIPATIVE EVOLUTION OF SQUEEZED AND DISPLACED NUMBER STATES
IN THE 3RD-ORDER NONLINEAR OSCILLATOR,“ PHYSICAL REVIEW A, vol. 48, iss. 5, pp. 3881-3889, 1993.
[Bibtex]
@article ISI:A1993MF74300066,
Author = PERINOVA, V and KREPELKA, J,
Title = FREE AND DISSIPATIVE EVOLUTION OF SQUEEZED AND DISPLACED NUMBER STATES
IN THE 3RD-ORDER NONLINEAR OSCILLATOR,
Journal = PHYSICAL REVIEW A,
Year = 1993,
Volume = 48,
Number = 5,
Pages = 3881-3889,
Month = NOV,
Abstract = The evolution of squeezed and displaced number states in the free and
dissipative third-order nonlinear oscillator is investigated from the
point of view of nonclassical phenomena as the number squeezing in both
the strong and the weak sense, the principal squeezing of vacuum
fluctuations, and the generation of superposition states. A destructive
effect of losses on quantum coherence is demonstrated.,
DOI = 10.1103/PhysRevA.48.3881,
ISSN = 1050-2947,
Unique-ID = ISI:A1993MF74300066,
J. KREPELKA, „REVERSIBILITY THEOREM FOR ANISOTROPIC STRATIFIED MEDIUM,“ JOURNAL OF MODERN OPTICS, vol. 40, iss. 8, pp. 1581-1586, 1993.
[Bibtex]
@article ISI:A1993LT05600014,
Author = KREPELKA, J,
Title = REVERSIBILITY THEOREM FOR ANISOTROPIC STRATIFIED MEDIUM,
Journal = JOURNAL OF MODERN OPTICS,
Year = 1993,
Volume = 40,
Number = 8,
Pages = 1581-1586,
Month = AUG,
Abstract = This contribution is intended to derive-following the reversibility
theorem-the consequences for the elements of the transfer matrix,
describing generally the system of absorbing anisotropic stratified
medium.,
DOI = 10.1080/09500349314551611,
ISSN = 0950-0340,
Unique-ID = ISI:A1993LT05600014,
1992
J. PERINA and J. KREPELKA, „FORWARD AND BACKWARD 4-WAVE-MIXING OF NONCLASSICAL LIGHT WITH PUMP
DEPLETION,“ JOURNAL OF MODERN OPTICS, vol. 39, iss. 12, pp. 2405-2419, 1992.
[Bibtex]
@article ISI:A1992KF91100003,
Author = PERINA, J and KREPELKA, J,
Title = FORWARD AND BACKWARD 4-WAVE-MIXING OF NONCLASSICAL LIGHT WITH PUMP
DEPLETION,
Journal = JOURNAL OF MODERN OPTICS,
Year = 1992,
Volume = 39,
Number = 12,
Pages = 2405-2419,
Month = DEC,
Abstract = Photon statistics and non-classical behaviour of forward and backward
four-wave mixing are examined including the coupling of modes in the
approximation of small fluctuations around a stationary point, which is
analytically determined and conditions for its stability are obtained.
The depletion of pump modes is involved and effects of nonlinear
dynamics, non-classical behaviour of input radiation, external noise and
losses are included.,
DOI = 10.1080/09500349214552441,
ISSN = 0950-0340,
Unique-ID = ISI:A1992KF91100003,
A. LUKS, V. PERINOVA, and J. KREPELKA, „SPECIAL STATES OF THE PLANE ROTATOR RELEVANT TO THE LIGHT-FIELD,“ PHYSICAL REVIEW A, vol. 46, iss. 1, pp. 489-498, 1992.
[Bibtex]
@article ISI:A1992JC55800065,
Author = LUKS, A and PERINOVA, V and KREPELKA, J,
Title = SPECIAL STATES OF THE PLANE ROTATOR RELEVANT TO THE LIGHT-FIELD,
Journal = PHYSICAL REVIEW A,
Year = 1992,
Volume = 46,
Number = 1,
Pages = 489-498,
Month = JUL 1,
Abstract = The screw operator is introduced in the system of the plane rotator and
applied to the ground state of the mathematical pendulum. The resulting
p state is studied from the viewpoint of the usual and modified
statistical and uncertainty characteristics relevant to quantum optics
and the quantum phase.,
DOI = 10.1103/PhysRevA.46.489,
ISSN = 1050-2947,
Unique-ID = ISI:A1992JC55800065,
J. PERINA and J. KREPELKA, „QUANTUM STATISTICS OF STIMULATED RAMAN AND HYPER-RAMAN SCATTERING OF
SQUEEZED LIGHT WITH PUMP DEPLETION,“ JOURNAL OF MODERN OPTICS, vol. 39, iss. 5, pp. 1029-1041, 1992.
[Bibtex]
@article ISI:A1992HY06200012,
Author = PERINA, J and KREPELKA, J,
Title = QUANTUM STATISTICS OF STIMULATED RAMAN AND HYPER-RAMAN SCATTERING OF
SQUEEZED LIGHT WITH PUMP DEPLETION,
Journal = JOURNAL OF MODERN OPTICS,
Year = 1992,
Volume = 39,
Number = 5,
Pages = 1029-1041,
Month = MAY,
Abstract = Using the approximation of small fluctuations around a stationary
solution, photon statistics and quadrature variances are derived in
stimulated Raman and hyper-Raman scattering including the coupling of
pumping, Stokes, anti-Stokes and phonon modes. The depletion of pump
light is included. Compared to Raman scattering, additional regimes to
generate anti-bunched, sub-Poisson and squeezed light were found caused
by self-interaction of the pump mode. It was possible to include effects
of nonlinear dynamics, initial squeezing of radiation and phonon system,
external noise and losses.,
DOI = 10.1080/09500349214551051,
ISSN = 0950-0340,
Unique-ID = ISI:A1992HY06200012,
A. LUKS, V. PERINOVA, and J. KREPELKA, „EXTENDED NUMBER STATE BASIS AND NUMBER-PHASE INTELLIGENT STATES OF
LIGHT-FIELD .2. THE REDUCED NUMBER-SINE INTELLIGENT AND JACKIW STATES,“ CZECHOSLOVAK JOURNAL OF PHYSICS, vol. 42, iss. 1, pp. 59-92, 1992.
[Bibtex]
@article ISI:A1992HG75700005,
Author = LUKS, A and PERINOVA, V and KREPELKA, J,
Title = EXTENDED NUMBER STATE BASIS AND NUMBER-PHASE INTELLIGENT STATES OF
LIGHT-FIELD .2. THE REDUCED NUMBER-SINE INTELLIGENT AND JACKIW STATES,
Journal = CZECHOSLOVAK JOURNAL OF PHYSICS,
Year = 1992,
Volume = 42,
Number = 1,
Pages = 59-92,
Month = JAN,
Abstract = The number-sine intelligent state is introduced for the extended Hilbert
space and reduced to serve as an approximation to the Jackiw number-sine
intelligent state. Usual and modified statistical and uncertainty
characteristics of these states are determined and compared. A new
technique is used for reconstructing the crescent state of Kitagawa and
Yamamoto and studying the properties of the reduced number-sine
intelligent state.,
DOI = 10.1007/BF01605159,
ISSN = 0011-4626,
Unique-ID = ISI:A1992HG75700005,
1991
V. PERINOVA, A. LUKS, J. KREPELKA, C. SIBILIA, and M. BERTOLOTTI, „QUANTUM STATISTICS OF LIGHT IN A LOSSLESS LINEAR COUPLER,“ JOURNAL OF MODERN OPTICS, vol. 38, iss. 12, pp. 2429-2457, 1991.
[Bibtex]
@article ISI:A1991GU17100009,
Author = PERINOVA, V and LUKS, A and KREPELKA, J and SIBILIA, C and BERTOLOTTI, M,
Title = QUANTUM STATISTICS OF LIGHT IN A LOSSLESS LINEAR COUPLER,
Journal = JOURNAL OF MODERN OPTICS,
Year = 1991,
Volume = 38,
Number = 12,
Pages = 2429-2457,
Month = DEC,
Abstract = The quantum description of light transferred by lossless linear
directional and contradirectional couplers is given. The periodica and
non-periodical switchings of light and its properties between modes are
presented in the dependence on the coupling constant and the detuning
for the generalized superpositions of coherent and chaotic fields at the
inputs.,
DOI = 10.1080/09500349114552581,
ISSN = 0950-0340,
Unique-ID = ISI:A1991GU17100009,
[Bibtex]
@article ISI:A1991GX44900024,
Author = KONAK, C and JAKES, J and STEPANEK, P and PETRAS, F and KARSKA, M and
KREPELKA, J and PERINA, J,
Title = EFFECT OF MULTIPLE LIGHT-SCATTERING ON TRANSMITTED AND SCATTERED-LIGHT,
Journal = APPLIED OPTICS,
Year = 1991,
Volume = 30,
Number = 33,
Pages = 4865-4871,
Month = NOV 20,
Abstract = Photocount distributions have been calculated and experimentally
determined for light transmitted through a dispersion of particles of
varying density. From these the coherent and incoherent components of
the transmitted light intensity could be determined. The coherent
intensity was shown to obey the Lambert-Beer law. Autocorrelation
functions of light scattered in the presence of multiple light
scattering were measured and inverted by using an inverse Laplace
transform technique. The single-scattering and multiple-scattering
contributions can be distinguished in the corresponding spectra of decay
times. The amount of multiple light scattering increases with increasing
concentration of scatterers and reaches the limit of strong multiple
light scattering when the transport of light through the dispersion
becomes diffusive.,
ISSN = 0003-6935,
Unique-ID = ISI:A1991GX44900024,
J. PERINA and J. KREPELKA, „STIMULATED RAMAN-SCATTERING OF SQUEEZED LIGHT WITH PUMP DEPLETION,“ JOURNAL OF MODERN OPTICS, vol. 38, iss. 11, pp. 2137-2151, 1991.
[Bibtex]
@article ISI:A1991GQ03700004,
Author = PERINA, J and KREPELKA, J,
Title = STIMULATED RAMAN-SCATTERING OF SQUEEZED LIGHT WITH PUMP DEPLETION,
Journal = JOURNAL OF MODERN OPTICS,
Year = 1991,
Volume = 38,
Number = 11,
Pages = 2137-2151,
Month = NOV,
Abstract = Using the approximation of small fluctuations around a stationary point,
photon statistics and squeezing of vacuum fluctuations are derived in
stimulated Raman scattering including the coupling of photon-photon and
photon-phonon modes. The depletion of pump light is described and it is
shown that a regime of inversion of the process is related to an
increase in quantum fluctuations, which are finally reduced again, more
in the anti-Stokes mode than in the Stokes mode. If the anti-Stokes
coupling is stronger than the Stokes coupling, then an oscillating
behaviour of the statistical characteristics occurs and substantial
squeezing can be found in photon-phonon modes.,
DOI = 10.1080/09500349114552231,
ISSN = 0950-0340,
Unique-ID = ISI:A1991GQ03700004,
[Bibtex]
@article ISI:A1991GN42000006,
Author = PERINA, J and KARSKA, M and KREPELKA, J,
Title = STIMULATED RAMAN-SCATTERING OF NONCLASSICAL LIGHT BY SQUEEZED PHONONS,
Journal = ACTA PHYSICA POLONICA A,
Year = 1991,
Volume = 79,
Number = 6,
Pages = 817-828,
Month = JUN,
Abstract = Quantum statistical properties are derived for stimulated Raman
scattering by squeezed phonons including squeezing of vacuum
fluctuations in radiation modes and sub-Poisson photon behaviour.
Initial radiation can be in squeezed thermalized and/or sub-Poisson
states, phonon system can also be squeezed. In particular, effects of
initial phase conditions, losses, initial nonclassical behaviour and
phonon squeezing are demonstrated in terms of reduced factorial moments
up to the fifth order in combined photon-photon and photon-phonon modes.
Also photon number distribution, quadrature variances and principal
squeeze parameters are shown.,
ISSN = 0587-4246,
Unique-ID = ISI:A1991GN42000006,
1989
V. PERINOVA and J. KREPELKA, „QUANTUM STATISTICS OF NONCLASSICAL RADIATION IN DISSIPATIVE FORWARD
4-WAVE MIXING .1. METHOD OF GENERALIZED SUPERPOSITION OF COHERENT AND
CHAOTIC FIELDS,“ PHYSICAL REVIEW A, vol. 39, iss. 8, pp. 4045-4055, 1989.
[Bibtex]
@article ISI:A1989U317500034,
Author = PERINOVA, V and KREPELKA, J,
Title = QUANTUM STATISTICS OF NONCLASSICAL RADIATION IN DISSIPATIVE FORWARD
4-WAVE MIXING .1. METHOD OF GENERALIZED SUPERPOSITION OF COHERENT AND
CHAOTIC FIELDS,
Journal = PHYSICAL REVIEW A,
Year = 1989,
Volume = 39,
Number = 8,
Pages = 4045-4055,
Month = APR 15,
DOI = 10.1103/PhysRevA.39.4045,
ISSN = 1050-2947,
Unique-ID = ISI:A1989U317500034,
1987
[Bibtex]
@article ISI:A1987L783900007,
Author = SZLACHETKA, P and PERINOVA, V and KREPELKA, J and LUKS, A and PERINA, J,
Title = GENERATION OF SQUEEZED STATES,
Journal = ACTA PHYSICA POLONICA A,
Year = 1987,
Volume = 72,
Number = 3,
Pages = 431-441,
Month = SEP,
ISSN = 0587-4246,
Unique-ID = ISI:A1987L783900007,
[Bibtex]
@article ISI:A1987L783900008,
Author = LUKS, A and PERINA, J and KREPELKA, J,
Title = QUANTUM CORRECTIONS TO CLASSICAL-SOLUTIONS FOR 2ND HARMONIC-GENERATION,
Journal = ACTA PHYSICA POLONICA A,
Year = 1987,
Volume = 72,
Number = 3,
Pages = 443-451,
Month = SEP,
ISSN = 0587-4246,
Unique-ID = ISI:A1987L783900008,
J. PERINA, J. BAJER, J. KREPELKA, and Z. HRADIL, „SQUEEZING AND SUB-POISSON STATISTICS IN 3-MODE INTERACTIONS,“ JOURNAL OF MODERN OPTICS, vol. 34, iss. 6-7, pp. 965-977, 1987.
[Bibtex]
@article ISI:A1987J991300016,
Author = PERINA, J and BAJER, J and KREPELKA, J and HRADIL, Z,
Title = SQUEEZING AND SUB-POISSON STATISTICS IN 3-MODE INTERACTIONS,
Journal = JOURNAL OF MODERN OPTICS,
Year = 1987,
Volume = 34,
Number = 6-7,
Pages = 965-977,
Month = JUN-JUL,
DOI = 10.1080/09500348714550871,
ISSN = 0950-0340,
Unique-ID = ISI:A1987J991300016,
BLURRED IMAGES WITH INCOHERENT-LIGHT,“ OPTIK, vol. 76, iss. 2, pp. 57-60, 1987.
[Bibtex]
@article ISI:A1987H690600004,
Author = KREPELKA, J and PERINA, J and TOCKIJ, A,
Title = OPTIMIZATION OF INVERSE FILTER TRANSFER-FUNCTION IN RESTORATION OF
BLURRED IMAGES WITH INCOHERENT-LIGHT,
Journal = OPTIK,
Year = 1987,
Volume = 76,
Number = 2,
Pages = 57-60,
Month = MAY,
ISSN = 0030-4026,
Unique-ID = ISI:A1987H690600004,
J. HOLOUBEK, H. KRUG, J. KREPELKA, J. PERINA, and Z. HRADIL, „LIGHT-SCATTERING SPECKLE PATTERNS AND THEIR CORRELATION-PROPERTIES,“ JOURNAL OF MODERN OPTICS, vol. 34, iss. 5, pp. 633-642, 1987.
[Bibtex]
@article ISI:A1987J423600004,
Author = HOLOUBEK, J and KRUG, H and KREPELKA, J and PERINA, J and HRADIL, Z,
Title = LIGHT-SCATTERING SPECKLE PATTERNS AND THEIR CORRELATION-PROPERTIES,
Journal = JOURNAL OF MODERN OPTICS,
Year = 1987,
Volume = 34,
Number = 5,
Pages = 633-642,
Month = MAY,
DOI = 10.1080/09500348714550651,
ISSN = 0950-0340,
Unique-ID = ISI:A1987J423600004,
J. PERINA, J. KREPELKA, R. HORAK, Z. HRADIL, and J. BAJER, „PHOTON STATISTICS OF NONCLASSICAL RADIATION IN 2ND HARMONIC-GENERATION,“ CZECHOSLOVAK JOURNAL OF PHYSICS, vol. 37, iss. 10, pp. 1161-1173, 1987.
[Bibtex]
@article ISI:A1987K510800006,
Author = PERINA, J and KREPELKA, J and HORAK, R and HRADIL, Z and BAJER, J,
Title = PHOTON STATISTICS OF NONCLASSICAL RADIATION IN 2ND HARMONIC-GENERATION,
Journal = CZECHOSLOVAK JOURNAL OF PHYSICS,
Year = 1987,
Volume = 37,
Number = 10,
Pages = 1161-1173,
DOI = 10.1007/BF01597032,
ISSN = 0011-4626,
Unique-ID = ISI:A1987K510800006,
1986
[Bibtex]
@article ISI:A1986F533200004,
Author = PERINOVA, V and KREPELKA, J and PERINA, J,
Title = PHOTON STATISTICS OF NONCLASSICAL FIELDS,
Journal = OPTICA ACTA,
Year = 1986,
Volume = 33,
Number = 10,
Pages = 1263-1278,
Month = OCT,
ISSN = 0030-3909,
Unique-ID = ISI:A1986F533200004,
[Bibtex]
@article ISI:A1986A387400003,
Author = PERINOVA, V and KREPELKA, J and PERINA, J and LUKS, A and SZLACHETKA, P,
Title = ENTROPY OF OPTICAL-FIELDS,
Journal = OPTICA ACTA,
Year = 1986,
Volume = 33,
Number = 1,
Pages = 15-32,
Month = JAN,
ISSN = 0030-3909,
Unique-ID = ISI:A1986A387400003,
1984
J. KREPELKA, J. PERINA, P. STEPANEK, and C. KONAK, „ON THE PHOTON STATISTICS OF LIGHT SCATTERED BY A SMALL NUMBER OF
PARTICLES,“ CZECHOSLOVAK JOURNAL OF PHYSICS, vol. 34, iss. 8, pp. 862-869, 1984.
[Bibtex]
@article ISI:A1984TJ82500009,
Author = KREPELKA, J and PERINA, J and STEPANEK, P and KONAK, C,
Title = ON THE PHOTON STATISTICS OF LIGHT SCATTERED BY A SMALL NUMBER OF
PARTICLES,
Journal = CZECHOSLOVAK JOURNAL OF PHYSICS,
Year = 1984,
Volume = 34,
Number = 8,
Pages = 862-869,
DOI = 10.1007/BF01795860,
ISSN = 0011-4626,
Unique-ID = ISI:A1984TJ82500009,
1983
DISTRIBUTION OF SCATTERED-LIGHT,“ OPTICA ACTA, vol. 30, iss. 11, pp. 1645-1654, 1983.
[Bibtex]
@article ISI:A1983RS54400009,
Author = KONAK, C and KREPELKA, J and PERINA, J,
Title = DETERMINATION OF A SMALL NUMBER OF PARTICLES FROM PHOTOCOUNT
DISTRIBUTION OF SCATTERED-LIGHT,
Journal = OPTICA ACTA,
Year = 1983,
Volume = 30,
Number = 11,
Pages = 1645-1654,
ISSN = 0030-3909,
Unique-ID = ISI:A1983RS54400009,
1982
MODULATED LUMINESCENCE RADIATION,“ OPTICA ACTA, vol. 29, iss. 8, pp. 1105-1116, 1982.
[Bibtex]
@article ISI:A1982PE58500009,
Author = KONAK, C and STEPANEK, P and DVORAK, L and KUPKA, Z and KREPELKA, J and
PERINA, J,
Title = DETERMINATION OF DECAY TIMES FROM PHOTOCOUNT STATISTICS OF WEAK
MODULATED LUMINESCENCE RADIATION,
Journal = OPTICA ACTA,
Year = 1982,
Volume = 29,
Number = 8,
Pages = 1105-1116,
ISSN = 0030-3909,
Unique-ID = ISI:A1982PE58500009,