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Zyryanov, V. Ya.
Polymer dispersed ferroelectric liquid crystals as display materials / V. Ya. Zyryanov, S. L. Smorgon, V. F. Shabanov // SID International Symposium : digest of technical papers. - 1992. - Vol. 23. - P. 776-777

Доп.точки доступа:
Smorgon, S. L.; Сморгон, Сергей Леонидович; Shabanov, V. F.; Шабанов, Василий Филиппович; Зырянов, Виктор Яковлевич; SID International Symposium(1 ; 1992 ; May 17-22 ; Boston, Massachusetts); Society for Information Display
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Zyryanov, V. Ya.
Polymer dispersed ferroelectric liqud-crystal light valves / V. Ya. Zyryanov, V. F. Shabanov, S. L. Smorgon, E. P. Pozhidaev // SID International Symposium : digest of technical papers. - 1994. - Vol. 25. - P. 605-607

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Доп.точки доступа:
Shabanov, V. F.; Шабанов, Василий Филиппович; Smorgon, S. L.; Сморгон, Сергей Леонидович; Pozhidaev, E. P.; Зырянов, Виктор Яковлевич; SID International Symposium(1994); Society for Information Display
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    Zobov, V. E.
    Reversible and Irreversible propagation of quantum information and its manifestation in multiple-quantum NMR spectra in solids / V. E. Zobov, A. A. Lundin // J. Exp. Theor. Phys. - 2020. - Vol. 131, Is. 2. - P. 273-279, DOI 10.1134/S1063776120060096. - Cited References: 33. - This work was supported by the Ministry of Science and Higher Education of the Russian Federation within the State Task 0082-2019-0001 (State Registration Number AAAA-A19-119012890064-7) . - ISSN 1063-7761. - ISSN 1090-6509
Рубрики:
DYNAMICS
   LOCALIZATION
   SIMULATIONS
   COHERENCES
Аннотация: On the basis of the earlier developed statistical theory of the growth of the effective size of correlated clusters (the number of correlated spins), an expression for the shape of the multiple-quantum (MQ) NMR spectrum is obtained that takes into account the loss of coherence in a spin system due, for example, to the controlled intervention of the experimenter. It is shown that the scrambling and decoherence processes in the MQ spectrum of the multiparticle system of a solid are not separated, unlike the corresponding spectra of some large isolated molecules [27] in a solution. The relations obtained allow one to extract the necessary information about the above processes (scrambling and decoherence) from the dependence of the MQ spectra on experimental parameters.

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Публикация на русском языке Зобов, Владимир Евгеньевич. Обратимое и необратимое распространение квантовой информации и проявление его в спектрах многоквантового ЯМР в твердом теле [Текст] / В. Е. Зобов, А. А. Лундин // Журн. эксперим. и теор. физ. - 2020. - Т. 158 Вып. 2. - С. 300-308

Держатели документа:
RAS, Fed Res Ctr, Kirensky Inst Phys, KSC,SB, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Semenov Inst Chem Phys, Moscow 117977, Russia.

Доп.точки доступа:
Lundin, A. A.; Зобов, Владимир Евгеньевич; Ministry of Science and Higher Education of the Russian Federation [0082-2019-0001, AAAA-A19-119012890064-7]
}
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    Zobov, V. E.
    Quantum discord in the central spin model / V. E. Zobov // Proceedings of SPIE : SPIE-Int. Soc. Optical Engineering, 2014. - Vol. 9440. - P. 94401E-94401E-8, DOI 10.1117/12.2180727. - Cited References:30 . - ISBN 0277. - ISBN 9781628415551
   Перевод заглавия: Квантовый дискорд в модели центрального спина

РУБ Engineering, Electrical & Electronic + Nanoscience & Nanotechnology
Рубрики:
DECOHERENCE
Кл.слова (ненормированные):
Electron-nuclear spin echo -- dynamical correlation -- mutual information -- quantum discord
Аннотация: The quantum properties of dynamic correlations in a system of an electron spin surrounded by nuclear spins under the conditions of free induction decay (FID) and spin echo have been studied. Analytical results for the time evolution of mutual information, classical part of correlations, and quantum part characterized by quantum discord have been obtained within the central spin model in the high-temperature approximation. The same formulas describe the quantum discord in both the FID and the spin echo although the forms of the dependences are different because of difference in the parameters entering into the formulas. Discord of the spin echo compared with the FID has a strong dependence on time at short times, and it tends to zero with decreasing of the magnetic field, whereas in the case of the FID it reaches a plateau.

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Доп.точки доступа:
Зобов, Владимир Евгеньевич; International Conference on Micro- and Nano-Electronics (Oct. 6-10, 2014 ; Zvenigorod, Russia)
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    Zobov, V. E.
    Quantum discord in the central spin model / V. E. Zobov // International Conference "Micro- and Nanoelectronics – 2014". - 2014. - Ст. q2-06. - Cited References:30
   Перевод заглавия: Квантовый дискорд в модели центрального спина
Кл.слова (ненормированные):
Electron-nuclear spin echo -- dynamical correlation -- mutual information -- quantum discord
Аннотация: The quantum properties of dynamic correlations in a system of an electron spin surrounded by nuclear spins under the conditions of free induction decay (FID) and spin echo have been studied. Analytical results for the time evolution of mutual information, classical part of correlations, and quantum part characterized by quantum discord have been obtained within the central spin model in the high-temperature approximation. The same formulas describe the quantum discord in both the FID and the spin echo although the forms of the dependences are different because of difference in the parameters entering into the formulas. Discord of the spin echo compared with the FID has a strong dependence on time at short times, and it tends to zero with decreasing of the magnetic field, whereas in the case of the FID it reaches a plateau.

Материалы конференции

Доп.точки доступа:
Зобов, Владимир Евгеньевич; International Conference on Micro- and Nano-Electronics (Oct. 6-10, 2014 ; Zvenigorod, Russia)International Conference on Micro- and Nano-Electronics(Oct. 6-10, 2014 ; Zvenigorod, Russia)
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Zobov, V. E.
Quantum and classical correlations in high-temperature dynamics of two coupled large spins / V. E. Zobov // THEOR. MATH. PHYS. - 2013. - Vol. 177, Is. 1. - P. 1377-1389, DOI 10.1007/s11232-013-0110-5 . - ISSN 0040-5779
Кл.слова (ненормированные):
generalized measurement -- high-temperature approximation -- mutual information -- quantum correlation -- spin coherent state -- spin dynamics
Аннотация: We study the dynamical correlations between two coupled spins depending on time and the value of the spin quantum numbers. In the high-temperature approximation, we obtain analytic expressions for the mutual information and the quantum and classical parts of correlations. We consider both orthogonal and nonorthogonal measurements in the basis of spin coherent states. We show that at small times, the quantum part of correlations becomes much less than the classical part as the spin quantum numbers increase, while the situation is quite different at times equal to half the quantum period.

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Публикация на русском языке Квантовые и классические корреляции в высокотемпературной динамике двух связанных больших спинов. - [S. l. : s. n.]

Доп.точки доступа:
Зобов, Владимир Евгеньевич
}
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    Zobov, V. E.
    Quantum and classical correlations in high temperature dynamics of two coupled large spins : conference paper / V. E. Zobov // Proc. SPIE. - 2012. - Vol.8700. - Ст. 87001D. - P. , DOI 10.1117/12.2016982. - Cited References: 17 . - ISSN 0277-786X. - ISSN 978-08194
   Перевод заглавия: Квантовые и классические корреляции в высокотемпературной динамике двух связанных больших спинов
Кл.слова (ненормированные):
Dynamical correlations -- Measurement -- Mutual information -- Nuclear magnetic resonance -- Spin coherent states
Аннотация: We study dynamical correlations of two coupled large spins depending on the time and on the spin quantum numbers. In the high-temperature approximation, we obtain analytical expressions for the mutual informations, quantum and classical parts of correlations. The latter was obtained performing the non-orthogonal projective (POVM) measurements onto the spin coherent states of two spins or one spin, as well as by means of the orthogonal projective measurement of von Neumann. Contribution from quantum correlations is much less than that from classical ones and decreasing with the increase in spin quantum numbers at short times. However, it is not so in a time equal to half of the quantum period. © 2012 SPIE.

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Доп.точки доступа:
Зобов, Владимир Евгеньевич; International Conference on Micro- and Nano-Electronics (Oct. 1-5, 2012 ; Zvenigorod, Russia)
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    Zobov, V. E.
    On the control of the spread of quantum information in multiple quantum NMR spectroscopy of solids / V. E. Zobov, A. A. Lundin // Proceedings of the International Conference "Micro- and Nanoelectronics – 2021". ICMNE – 2021 : book of abstracts : Oct. 4-8, 2021, Moscow - Zvenigorod, Russia. - 2021. - Ст. q3-02. - P. 149. - Cited References: 5
   Перевод заглавия: О контроле распространением квантовой информации в многоквантовой ЯМР спектроскопии твердых тел

Материалы конференции,
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Доп.точки доступа:
Lundin, A. A.; Лундин, Андрей Арнольдович; Зобов, Владимир Евгеньевич; "Micro- and Nano-Electronics", International Conference(2021 ; Oct. ; Zvenigorod); "Микро- и наноэлектроника", международная конференция(2021 ; окт. ; Звенигород); Квантовая информатика, симпозиум(2021 ; окт. ; Звенигород)Российская академия наук; Физико-технологический институт имени К.А. Валиева РАН
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Zobov, V. E.
Multiple-quantum NMR spectroscopy and quantum information spreading control in the spin systems of solids / V. E. Zobov, A. A. Lundin // J. Exp. Theor. Phys. - 2022. - Vol. 135, Is. 5. - P. 752-761, DOI 10.1134/S1063776122110139. - Cited References: 49. - This work was supported within the State assignment of the Ministry of Science and Higher Education of the Russian Federation (registration number 1021051201992-1) . - ISSN 1063-7761. - ISSN 1090-6509
Аннотация: Multiple-quantum (MQ) solid-state NMR spectroscopy allows the growth of multiple-spin correlations and, thus, the spreading of quantum information in the object under study to be observed. Recently, in [11] it was proposed to control this process through a controlled perturbation added to the effective Hamiltonian that causes degradation of correlated spin clusters with a rate determined by the number of spins K in a cluster. However, this perturbation can also lead to degradation whose rate is determined by the coherence order M. In this paper, to investigate the influence of a small added perturbation, we used an expansion into orthogonal operators that allowed the cluster size distribution to be taken into account. In our calculations we realized a simple model with known amplitudes of the expansion into a complete set of orthogonal operators in the absence of a perturbation. We performed numerical calculations of the “preparation time” dependences of the MQ spectra, their second moments, and the coherence orders at which the MQ spectra decrease by a factor of e as well as the average correlated spin cluster sizes K¯. The coherence-order-dependent contribution to the degradation is shown to change the shape of the MQ spectrum. In particular, as the preparation time increases, the MQ spectrum can be stabilized, while the growth of K¯ is retained. Due to the change in the shape of the MQ spectrum, the relations of its characteristics to the number K¯ change compared to those for the Gaussian function (traditionally used to process the experiments). These changes should be taken into account when studying the spreading of quantum information through MQ spectroscopy.

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Публикация на русском языке Зобов, Владимир Евгеньевич. Многоквантовая ЯМР-спектроскопия и управление распространением квантовой информации в спиновых системах твердых тел [Текст] / В. Е. Зобов, А. А. Лундин // Журн. эксперим. и теор. физ. - 2022. - Т. 162 Вып. 5. - С. 778-789

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036, Krasnoyarsk, Russia
Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 117977, Moscow, Russia

Доп.точки доступа:
Lundin, A. A.; Зобов, Владимир Евгеньевич
}
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10.

    Zobov, V. E.
    Clustering by quantum annealing on the three-level quantum elements qutrits / V. E. Zobov, I. S. Pichkovskiy // Quantum Inf. Process. - 2022. - Vol. 21, Is. 4. - Ст. 144, DOI 10.1007/s11128-022-03482-0. - Cited References: 28. - This study was supported by the Theoretical Physics and Mathematics Advancement Foundation “BASIS” #20-1-5-41-1. We are grateful for their trust and assistance in research . - ISSN 1570-0755
   Перевод заглавия: Кластеризация посредством квантового отжига на квантовых трёхуровневых элементах кутритах
Кл.слова (ненормированные):
Quantum adiabatic algorithm -- Quantum annealing -- Qutrit -- Clustering
Аннотация: Clustering is grouping of data by the proximity of some properties. We report on the possibility of increasing the efficiency of clustering of points in a plane using artificial quantum neural networks after the replacement of the two-level neurons called qubits represented by the spins S = 1/2 by the three-level neurons called qutrits represented by the spins S = 1. The problem has been solved by the slow adiabatic change of the Hamiltonian in time. The methods for controlling a qutrit system using projection operators have been developed and the numerical simulation has been performed. The Hamiltonians for two well-known clustering methods, one-hot encoding and k-means, have been built. The first method has been used to partition a set of six points into three or two clusters and the second method, to partition a set of nine points into three clusters and seven points into four clusters. The simulation has shown that the clustering problem can be effectively solved on qutrits represented by the spins S = 1. The advantages of clustering on qutrits over that on qubits have been demonstrated. In particular, the number of qutrits required to represent N data points is smaller than the number of qubits by a factor of log 2N/ log 3N. For qutrits, the simplest is to partition the data points into three clusters rather than two ones. At the data partition into more than three clusters, it has been proposed to number the clusters by the numbers of states of the corresponding multi-spin subsystems, instead of using the numbers of individual spins. This reduces even more the number of qutrits (Nlog 3K instead of NK) required to implement the algorithm.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Pichkovskiy, I. S.; Пичковский, Иван Сергеевич; Зобов, Владимир Евгеньевич
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11.

    Zobov, V. E.
    Associative memory on qutrits by means of quantum annealing / V. Zobov, I. Pichkovskiy // Quantum Inf. Process. - 2020. - Vol. 19, Is. 9. - Ст. 342, DOI 10.1007/s11128-020-02851-x. - Cited References: 23 . - ISSN 1570-0755. - ISSN 1573-1332
   Перевод заглавия: Ассоциативная память на кутритах посредством квантового отжига
Кл.слова (ненормированные):
Quantum adiabatic algorithm -- Quantum annealing -- Qubit -- Qutrit -- Associative memory -- Memory capacity
Аннотация: When associative memory is implemented on the well-studied Hopfield network, patterns are recorded in the interaction constants between binary neurons. These constants are chosen so that each pattern should have its own minimum energy of the system described by the Ising model. In the quantum version of the Hopfield network, it was proposed to recall such states by the adiabatic change of the Hamiltonian in time. Qubits, quantum elements with two states, for example, spins with S=1/2 were considered as neurons. In this paper, for the first time, we study the function of associative memory using three-level quantum elements-qutrits, represented by spins with S=1. We record patterns with the help of projection operators. This choice is due to the need to operate with a state with a zero spin projection, whose interaction with the magnetic field vanishes. We recall the state corresponding to one of the patterns recorded in the memory, or superposition of such states by means of quantum annealing. To equalize the probabilities of finding the system in different states of superposition, an auxiliary Hamiltonian is proposed, which is turned off at the end of evolution. Simulations were performed on two and three qutrits and an increase in the memory capacity after replacing qubits with qutrits was shown.

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Держатели документа:
RAS, Fed Res Ctr, Kirensky Inst Phys, KSC,SB, Akademgorodok 50,Bld 38, Krasnoyarsk, Russia.

Доп.точки доступа:
Pichkovskiy, I. S.; Пичковский, Иван Сергеевич; Зобов, Владимир Евгеньевич
}
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12.

Unit for measuring the magnetic characteristics of thin ferromagnetic films / S. Kleshnina, B. Belyaev, N. Boev [et al.] // Ural Symposium on Biomedical Engineering, Radioelectronics and Information Technology, USBEREIT 2020 : proceedings. - 2020. - Ст. 9117609. - P. 326-329, DOI 10.1109/USBEREIT48449.2020.9117609. - Cited References: 7. - This work was supported by the Ministry of Education and Science of 075 11 2019-054
Кл.слова (ненормированные):
thin magnetic films -- measuring unit -- magnetic characteristics -- ferromagnetic resonance
Аннотация: Studying the properties of ferromagnetic films helps in solving the fundamental problems of the physics of magnetic phenomena and in developing the theory of ferromagnetism. Modern software and hardware, along with reliable diagnostic methods are used to research and design thin-film devices. In this regard, the development of devices and methods for measuring the magnetic characteristics of thin ferromagnetic films is an essential task. The aim of the work is to develop an unit for local measurements of the magnetic characteristics of thin ferromagnetic films, which has the ability to change the degree of locality of measurements over a wide range and has high sensitivity at the same time. The article reviews a new unit for measuring the magnetic characteristics of thin ferromagnetic films. The unit allows measuring the value and direction of the anisotropy field on a local area of the film. A block diagram and description of a new unit, as well as methods of measurements are shown in the article. The experimentally obtained distribution of the anisotropy field over the area of the studied sample of Ni 80 Fe 20 film is shown in this work. The experimental results confirm the compliance of the new unit with the declared characteristics. The unit can be used for non-destructive quality control and for measuring uniformity of thin ferromagnetic films magnetic characteristics.

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Держатели документа:
Laboratory of Electrodynamics and Microwave Electronics, Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, Krasnoyarsk, Russia

Доп.точки доступа:
Kleshnina, S. A.; Клешнина, Софья Андреевна; Belyaev, B. A.; Беляев, Борис Афанасьевич; Boev, N. M.; Боев, Никита Михайлович; Izotov, A. V.; Изотов, Андрей Викторович; Burmitskikh, A. V.; Бурмитских, Антон Владимирович; Gorchakovsky, A.; Горчаковский, Александр Антонович; Ural Symposium on Biomedical Engineering, Radioelectronics and Information Technology(2020 ; 14-15 May ; Yekaterinburg, Russia); Institute of Electrical and Electronics Engineers
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13.

Thermooptical information recording in the bistable films of polymer dispersed cholesteric liquid crystals / A. V. Barannik, V. Ya. Zyryanov, P. G. Shkuryaev, V. F. Shabanov // Информационная оптика. Научные основы и технологии : международный симпозиум OIST'97 : программа и аннот. докл. - Москва, 1997. - С. 42

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Доп.точки доступа:
Barannik, A. V.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Shkuryaev, P. G.; Shabanov, V. F.; Шабанов, Василий Филиппович; "Информационная оптика. Научные основы и технологии", международный симпозиум(1997 ; 27-30 авг. ; Москва); "Optical information science and technology", International symposium(1997 ; 27-30 aug. ; Moscow)
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14.

Thermooptical information recording in the bistable films of polymer dispersed cholecteric liquid crystals / A. V. Barannik, V. Ya. Zyryanov, P. G. Shkuryaev, V. F. Shabanov // Proceedings of SPIE. - 1998. - Vol. 3347. - P. 102-112

Доп.точки доступа:
Barannik, A. V.; Баранник, Алексей Владимирович; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Shkuryaev, P. G.; Shabanov, V. F.; Шабанов, Василий Филиппович; Optical Information Science and Technology(1997 ; Aug. 27-30 ; Moscow)
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15.

Thermooptical information record in polymer-capsulated cholesteric liquid crystals / V. Y. Zyryanov [и др.] // Zhurnal Tek. Fiz. - 1996. - Vol. 66, Is. 8. - P. 99-106. - Cited References: 9 . - ISSN 0044-4642

РУБ Physics, Applied

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Доп.точки доступа:
Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Zhuikov, V. A.; Жуйков, Владимир Александрович; Smorgon, S. L.; Сморгон, Сергей Леонидович; Shabanov, V. F.; Шабанов, Василий Филиппович; Adomenas, P. V.
}
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16.

Thermooptical information record in bistable PDChLC films by focused light beam / A. V. Barannik, V. Ya. Zyryanov, V. F. Shabanov // 17th International Liquid Crystal Conference (ILCC 1998) : program and abstract book. - 1998. - P. 252

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Доп.точки доступа:
Barannik, A. V.; Баранник, Алексей Владимирович; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Shabanov, V. F.; Шабанов, Василий Филиппович; International Liquid Crystal Conference(17 ; 1998 ; 19-24 July ; Strasbourg)
}
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17.

THERMOMAGNETIC WRITING OF ANALOGOUS INFORMATION ON RFE(R-TB, DY) FILMS / L. V. BURKOVA [и др.] // Zhurnal Tek. Fiz. - 1985. - Vol. 55, Is. 4. - P. 707-713. - Cited References: 17 . - ISSN 0044-4642

РУБ Physics, Applied

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Доп.точки доступа:
BURKOVA, L. V.; ERUKHIMOV, M. S.; SEREDKIN, V. A.; FROLOV, G. I.; YAKOVCHUK, V. Y.
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18.

The stability of the pheromones of xylophagous insects to environmental factors: An evaluation by quantum chemical analysis / P. V. Artyushenko [et al.] // Biophysics. - 2017. - Vol. 62, Is. 4. - P. 532-538, DOI 10.1134/S0006350917040029. - Cited References: 50 . - ISSN 0006-3509
Кл.слова (ненормированные):
insects -- xylophages -- pheromones -- molecules -- chemical properties -- environment -- impact -- information -- research -- effectiveness
Аннотация: The ground and excited states of the pheromone molecules produced by xylophagous insects (the bark beetle Ips typographus L., the black fir sawyer beetle Monochamus urussovi Fisch., and the black pine sawyer M. galloprovincialis Oliv.) were modeled using a quantum chemical method utilizing DFT (density functional theory) with the B3LYP functional. The absorption wavelengths (energies) and dipole moments were calculated; the transitions of electrons from occupied to empty molecular orbitals were considered. The computed data were used to assess the stability of pheromone molecules exposed to environmental factors, such as solar radiation and humidity.

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Публикация на русском языке Устойчивость феромонов насекомых-ксилофагов к факторам внешней cpеды: оценка на основе квантово -химического анализа [Текст] / П. В. Артюшенко [и др.] // Биофизика : Наука, 2017. - Т. 62 № 4. - С. 657-664

Держатели документа:
International Research Center for Studies of Extreme States of the Body, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Sukachev Institute of Forest, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Artyushenko, P. V.; Tomilin, F. N.; Томилин, Феликс Николаевич; Kuzubov, A. A.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Tsikalova, P. E.; Ovchinnikova, T. M.; Soukhovolsky, V. G.
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19.

The comparative analysis of the solid-state 31P NMR spectra of Re-Pt vinylidene complexes / K. T. Smolyarov [et al.] // J. Phys. Conf. Ser. - 2019. - Vol. 1399. - Ст. 022028, DOI 10.1088/1742-6596/1399/2/022028. - Cited References: 11 . - ISSN 1742-6588. - ISSN 1742-6596
Рубрики:
Applied Physics
Аннотация: The two vinylidene complexes Cp(CO)2 RePt(μ-C=CHPh)(PPh3 )(CO) and Cp(CO)2 RePt(μ-C=CHPh)(PPh3 )2 and their precursors PPh3 and P(PPh3 )4 were studied by solid-state nuclear magnetic resonance. We analysed 31P cross-polarization spectra acquired in static conditions and with magic angle spinning. The chemical shift tensors of each sample were determined by fitting their spectra using SIMPSON simulations.

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Держатели документа:
Federal Research Center "Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences" (KSC SB RAS), Krasnoyarsk, Russia
Kirensky Institute of Physics SB RAS, Krasnoyarsk, Russia
Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk, Russia

Доп.точки доступа:
Smolyarov, K. T.; Volkov, N. V.; Matsulev, A. N.; Kondrasenko, A. A.; Кондрасенко, Александр Александрович; International Scientific Conference "Conference on Applied Physics, Information Technologies and Engineering"(25-27 September 2019 ; Krasnoyarsk, Russian Federation)
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20.

Statistical study of the conductance and shot noise in open quantum-chaotic cavities: Contribution from whispering gallery modes / E. N. Bulgakov [et al.] // Phys. Rev. B. - 2006. - Vol. 73, Is. 15. - Ст. 155302, DOI 10.1103/PhysRevB.73.155302. - Cited References: 20 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
HELMHOLTZ EQUATION
   INFORMATION-THEORY
   NUCLEAR-REACTIONS
   TRANSPORT
Аннотация: In the past, a maximum-entropy model was introduced and applied to the study of statistical scattering by chaotic cavities, when short paths may play an important role in the scattering process. In particular, the validity of the model was investigated in relation with the statistical properties of the conductance in open chaotic cavities. In this paper we investigate further the validity of the maximum-entropy model, by comparing the theoretical predictions with the results of computer simulations, in which the Schrodinger equation is solved numerically inside the cavity for one and two open channels in the leads; we analyze, in addition to the conductance, the zero-frequency limit of the shot-noise power spectrum. We also obtain theoretical results for the ensemble average of this last quantity, for the orthogonal and unitary cases of the circular ensemble and an arbitrary number of channels. Generally speaking, the agreement between theory and numerics is good. In some of the cavities that we study, short paths consist of whispering gallery modes, which were excluded in previous studies. These cavities turn out to be all the more interesting, as it is in relation with them that we found certain systematic discrepancies in the comparison with theory. We give evidence that it is the lack of stationarity inside the energy interval that is analyzed, and hence the lack of ergodicity-a property assumed in the maximum-entropy model-that gives rise to the discrepancies. Indeed, the agreement between theory and numerical simulations is improved when the energy interval is reduced to a point and the statistics is then collected over an ensemble obtained by varying the position of an obstacle inside the cavity. It thus appears that the maximum-entropy model is valid beyond the domain where it was originally derived. An understanding of this situation is still lacking at the present moment.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
Univ Zaragoza, Inst Ciocomputat & Fis Sistemas Complejos, E-50009 Zaragoza, Spain
ИФ СО РАН
Kirensky Institute of Physics, 660036 Krasnoyarsk, Russian Federation
Max-Planck-Institut fur Physik Komplexer Systeme, D-01187 Dresden, Germany
Instituto de Biocomputacion Y Fisica de Sistemas Complejos, Universidad de Zaragoza, Corona de Aragon, 42, 50009 Zaragoza, Spain
Instituto de Fisica, U.N.A.M., Apartado Postal 20-364, 01000 Mexico, Mexico

Доп.точки доступа:
Bulgakov, E. N.; Булгаков, Евгений Николаевич; Gopar, V. A.; Mello, P. A.; Rotter, I.
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