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8.0
Jun 29, 2018
06/18
by
A. V. Kavokin; A. S. Sheremet; M. Yu. Petrov
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eye 8
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Chances of a gambler are always lower than chances of a casino in the case of an ideal, mathematically perfect roulette, if the capital of the gambler is limited and the minimum and maximum allowed bets are limited by the casino. However, a realistic roulette is not ideal: the probabilities of realisation of different numbers slightly deviate. Describing this deviation by a statistical distribution with a width {\delta} we find a critical {\delta} that equalizes chances of gambler and casino in...
Topics: General Finance, Quantitative Finance
Source: http://arxiv.org/abs/1602.06943
2
2.0
Jun 29, 2018
06/18
by
D. F. Kornovan; A. S. Sheremet; M. I. Petrov
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eye 2
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In this paper we develop a microscopic analysis of the light scattering on a periodic two-level atomic array coupled to an optical nanofiber. We extend the scattering matrix approach for two-level system interaction with nanofiber fundamental waveguiding mode HE_{11}, that allows us modeling the scattering spectra. We support these results considering the dispersion of the polaritonic states formed by the superposition of the fundamental mode of light HE_{11} and the atomic chain states. To...
Topics: Optics, Physics
Source: http://arxiv.org/abs/1608.03202
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42
Sep 22, 2013
09/13
by
A. S. Sheremet; O. S. Mishina; E. Giacobino; D. V. Kupriyanov
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We consider the coherent stimulated Raman process developing in an optically dense and disordered atomic medium in application to the quantum memory scheme. Our theoretical model predicts that the hyperfine interaction in the excited state of alkali atoms can positively affect on the quantum memory efficiency. Based on the concept of the coherent information transfer we analyze and compare the memory requirements for storage of single photon and macroscopic multi-photon light pulses.
Source: http://arxiv.org/abs/1001.3953v1
2
2.0
Jun 29, 2018
06/18
by
A. S. Sheremet; O. V. Kibis; A. V. Kavokin; I. A. Shelykh
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eye 2
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We developed the theory of spin dependent transport through a spin-modulator device (so-called Datta-and-Das spin transistor) in the presence of a high-frequency electromagnetic field (dressing field). Solving the Schr\"odinger problem for dressed electrons, we demonstrated that the field drastically modifies the spin transport. In particular, the dressing field leads to renormalization of spin-orbit coupling constants that varies conductivity of the spin transistor. The present effect...
Topics: Mesoscale and Nanoscale Physics, Condensed Matter
Source: http://arxiv.org/abs/1603.01678
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40
Sep 23, 2013
09/13
by
A. S. Sheremet; O. S. Mishina; N. V. Larionov; D. V. Kupriyanov
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We consider the Autler-Townes effect when a strong coupling field is applied in the hyperfine manifold of an alkali atom. Explicit solution is obtained in the case of the D1-line. We show how the hyperfine interaction modifies the dressing effects associated with the strong field as well as the sample susceptibility with respect to the probe mode. Particularly, if the strong field is far detuned from the atomic resonance line the Autler-Townes structure differs significantly from the prediction...
Source: http://arxiv.org/abs/0903.3520v1
2
2.0
Jun 30, 2018
06/18
by
A. V. Kavokin; A. S. Sheremet; I. A. Shelykh; P. G. Lagoudakis; Y. G. Rubo
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eye 2
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Exciton-polaritons are mixed light-matter quasiparticles. We have developed a statistical model describing stochastic exciton-photon transitions within a condensate of exciton polaritons. We show that the exciton-photon correlator depends on the "hidden variable" which characterizes the rate of exciton-photon transformations in the condensate. We discuss implications of this effect for the quantum statistics of photons emitted by polariton lasers.
Topics: Mesoscale and Nanoscale Physics, Condensed Matter
Source: http://arxiv.org/abs/1412.7425
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28
Sep 22, 2013
09/13
by
O. S. Mishina; N. V. Larionov; A. S. Sheremet; I. M. Sokolov; D. V. Kupriyanov
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eye 28
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We consider the coherent stimulated Raman process developing in an optically dense disordered atomic medium, which can also incoherently scatter the light over all outward directions. The Raman process is discussed in the context of a quantum memory scheme and we point out the difference in its physical nature from a similar but not identical protocol based on the effect of electromagnetically induced transparency (EIT). We show that the Raman and EIT memory schemes do not compete but...
Source: http://arxiv.org/abs/0805.3353v3
49
49
Sep 23, 2013
09/13
by
L. Veissier; A. Nicolas; L. Giner; D. Maxein; A. S. Sheremet; E. Giacobino; J. Laurat
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We report on an experiment in which orbital angular momentum of light is mapped at the single-photon level into and out of a cold atomic ensemble. Based on the dynamic electromagnetically-induced transparency protocol, the demonstrated optical memory enables the reversible mapping of Laguerre-gaussian modes with preserved handedness of the helical phase structure. The demonstrated capability opens the possibility to the storage of qubits encoded as superpositions of orbital angular momentum...
Source: http://arxiv.org/abs/1212.2382v2
2
2.0
Jun 30, 2018
06/18
by
A. S. Sheremet; D. F. Kornovan; L. V. Gerasimov; B. Gouraud; J. Laurat; D. V. Kupriyanov
texts
eye 2
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Light transport in a dense and disordered cold atomic ensemble, where the cooperation of atomic dipoles essentially modifies their coupling with the radiation modes, offers an alternative approach to light-matter interfacing protocols. Here, we show how the cooperativity and quasi-static dipole interaction affect the process of light propagation under the conditions of electromagnetically-induced transparency (EIT). We perform comparative analysis of the self-consistent approach with ab-initio...
Topic: Quantum Physics
Source: http://arxiv.org/abs/1411.4771
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27
Sep 23, 2013
09/13
by
S. Balik; A. L. Win; M. D. Havey; A. S. Sheremet; I. M. Sokolov; D. V. Kupriyanov
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We report an experimental study of near resonance light scattering on the $F = 1 \rightarrow F' = 0$ component of the $D_2$ line in atomic $^{87}Rb$. Experiments are performed on spatially bi-Gaussian ultracold gas samples having peak densities ranging from about $5 \cdot 10^{12} - 5 \cdot 10^{13}$ atoms/cm$^{3}$ and for a range of resonance saturation parameters and detunings from atomic resonance. Time resolution of the scattered light intensity reveals dynamics of multiple light scattering,...
Source: http://arxiv.org/abs/1303.0037v1
4
4.0
Jun 29, 2018
06/18
by
N. V. Corzo; B. Gouraud; A. Chandra; A. Goban; A. S. Sheremet; D. V. Kupriyanov; J. Laurat
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We report experimental observations of large Bragg reflection from arrays of cold atoms trapped near a one-dimensional nanoscale waveguide. By using an optical lattice in the evanescent field surrounding a nanofiber with a period nearly commensurate with the resonant wavelength, we observe a reflectance of up to 75% for the guided mode. Each atom behaves as a partially-reflecting mirror and an ordered chain of about 2000 atoms is sufficient to realize an efficient Bragg mirror. Measurements of...
Topics: Atomic Physics, Quantum Physics, Optics, Physics
Source: http://arxiv.org/abs/1604.03129
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11
Jun 28, 2018
06/18
by
T. C. H. Liew; Y. G. Rubo; A. S. Sheremet; S. De Liberato; I. A. SHelykh; F. P. Laussy; A. V. Kavokin
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eye 11
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Bosonic cascades formed by lattices of equidistant energy levels sustaining radiative transitions between nearest layers are promising for the generation of coherent terahertz radiation. We show how, also for the light emitted by the condensates in the visible range, they introduce new regimes of emission. Namely, the quantum statistics of bosonic cascades exhibit super-bunching plateaus. This demonstrates further potentialities of bosonic cascade lasers for the engineering of quantum...
Topics: Quantum Gases, Condensed Matter
Source: http://arxiv.org/abs/1506.06873
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43
Sep 22, 2013
09/13
by
O. S. Mishina; M. Scherman; P. Lombardi; J. Ortalo; D. Felinto; A. S. Sheremet; A. Bramati; D. V. Kupriyanov; J. Laurat; E. Giacobino
texts
eye 43
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Electromagnetically induced transparency (EIT) has mainly been modelled for three-level systems. In particular, a considerable interest has been dedicated to the Lambda-configuration, with two ground states and one excited state. However, in the alkali-metal atoms, which are commonly used, hyperfine interaction in the excited state introduces several levels which simultaneously participate in the scattering process. When the Doppler broadening is comparable with the hyperfine splitting in the...
Source: http://arxiv.org/abs/1101.6039v4
