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Общее количество найденных документов : 58
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1.


    Berman, G. P.
    Quantum chaos in interactions of multilevel quantum-systems with a coherent radiation-field / G. P. Berman, A. R. Kolovskii // Uspekhi Fiz. Nauk. - 1992. - Vol. 162, Is. 4. - P. 95-141. - Cited References: 36 . - ISSN 0042-1294
РУБ Physics, Multidisciplinary
Рубрики:
QUASIENERGY FUNCTIONS
   RESONANCES

   BEHAVIOR

   OVERLAP

Аннотация: The paper is short review of the papers devoted to the dynamics of the multilevel quantum systems affected by the external periodic field. The main attention is paid to the phenomenon of the quantum nonlinear resonance and the interaction of the two quantum nonlinear resonances, when the dynamics of the system is chaotic in the classical limit. The paper also contains the analysis of some physical systems where these phenomena take place. 30 figs. 37 refs.

WOS

Доп.точки доступа:
Kolovskii, A. R.; Коловский, Андрей Радиевич; Берман, Геннадий Петрович
}
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2.


   
    Dynamic chaos in magnetic systems / K. N. Alekseyev [et al.] // Uspekhi Fiz. Nauk. - 1992. - Vol. 162, Is. 7. - P. 81-118. - Cited References: 99 . - ISSN 0042-1294
РУБ Physics, Multidisciplinary
Рубрики:
CLASSICAL SPIN CLUSTERS
   YTTRIUM-IRON-GARNET

   PARALLEL-PUMPED MAGNONS

   NON-LINEAR SYSTEMS

   QUANTUM CHAOS

   FAT FRACTALS

   FERROMAGNETIC (CH3NH3)2CUCL4

   NONLINEAR DYNAMICS

   LEVEL REPULSION

   KICKED TOP

Аннотация: A review of the theoretical and experimental investigations of chaos in magnetic systems is represented. Both dissipative and Hamiltonian systems are considered. Basic scenarios of transitions to chaos in such systems are overlooked. Models and characteristics of chaotic oscillations in a parametric excitation of spin waves. NMR-masers, dynamics of spin chains, motion of spin in an external oscillating magnetic field and nonlinear NMR with a dynamic frequency shift are discussed. A problem of the quantum chaos in spin systems is analysed.

WOS

Доп.точки доступа:
Alekseyev, K. N.; Berman, G. P.; Берман, Геннадий Петрович; Tsifrinovich, V. I.; Цифринович, Владимир Ильич; Frishman, A. M.
}
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3.


   
    Structure formation and thermomagnetic recording in 2-dimensional magnetic systems / V. V. Beloshapkin [и др.] // Fiz. Tverd. Tela. - 1991. - Vol. 33, Is. 9. - P. 2554-2560. - Cited References: 12 . - ISSN 0367-3294
РУБ Physics, Condensed Matter
Рубрики:
THIN-FILMS
   TRANSITION


WOS

Доп.точки доступа:
Beloshapkin, V. V.; Белошапкин, Валерий Васильевич; Berman, G. P.; Берман, Геннадий Петрович; Seredkin, V. A.; Середкин, Виталий Александрович; Tretyakov, A. G.; Третьяков, Александр Григорьевич; Frolov, G. I.; Фролов, Георгий Иванович; Tsybina, Z. B.
}
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4.


    Berman, G. P.
    Quantum chaos in a diatomic molecule interacting with a resonant field / G. P. Berman, A. R. Kolovsky // Zhurnal Eksperimentalnoi Teor. Fiz. - 1989. - Vol. 95, Is. 5. - P. 1553-1561. - Cited References: 10 . - ISSN 0044-4510
РУБ Physics, Multidisciplinary


WOS
Доп.точки доступа:
Kolovsky, A. R.; Коловский, Андрей Радиевич; Берман, Геннадий Петрович
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5.


    Alekseyev, K. N.
    Chaotic dynamics in nuclear-magnetic-resonance / K. N. Alekseyev, G. P. Berman, V. I. Tsifrinovich // Zhurnal Eksperimentalnoi Teor. Fiz. - 1990. - Vol. 97, Is. 4. - P. 1277-1287. - Cited References: 21 . - ISSN 0044-4510
РУБ Physics, Multidisciplinary


WOS
Доп.точки доступа:
Berman, G. P.; Берман, Геннадий Петрович; Tsifrinovich, V. I.
}
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6.


   
    Resonant tunneling in time-periodically modulated semiconductor nanostructures / G. P. Berman [et al.] // Physica B. - 1996. - Vol. 225, Is. 1-2. - P. 1-22, DOI 10.1016/0921-4526(96)00233-5. - Cited References: 39 . - ISSN 0921-4526
РУБ Physics, Condensed Matter
Рубрики:
DOUBLE BARRIERS
   TRANSMISSION

   HETEROSTRUCTURES

Аннотация: We consider a semiconductor (AlGaAs/GaAs/AlGaAs) double-barrier resonant tunneling nanostructure (DBRTS), in which the bottom of the potential well is modulated by an external periodic potential V(t) = V-mod cos Omega t. We examine the resonance response to both mono-energetic and spatially localized incident electrons, extending previous results in three ways. First, we study numerically the resonant characteristics in the transmission probabilities as functions of both the electron's energy and the frequency of the external field. We find that new low-frequency resonant peaks appear in the frequency dependence of the transmission probabilities and discuss the origin and possible experimental observation of these peaks. Second, we develop an analytic perturbation theory (valid for small values of the parameter lambda = V-mod/h Omega) describing the processes of absorption and emission of single quanta of the modulation field and show that this perturbative treatment agrees well with the results of numerical calculations in the appropriate regions, up to and including the regime in which the one-quantum processes saturate. Third, for localized (Gaussian) incident wave packets, we show numerically that temporal modulations of the potential well in the DBRTS can induce spatial modulations in the transmitted and reflected wave packets. We develop a simple qualitative picture that explains our results. Finally, we estimate characteristic values of the parameters relevant for possible observation of these effects in laboratory experiments.

WOS
Держатели документа:
LOS ALAMOS NATL LAB,CNLS,LOS ALAMOS,NM 87545
LV KIRENSKII INST PHYS,DEPT PHYS,KRASNOYARSK 660036,RUSSIA
UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801
ИФ СО РАН

Доп.точки доступа:
Berman, G. P.; Берман, Геннадий Петрович; Bulgakov, E. N.; Булгаков, Евгений Николаевич; Campbell, D. K.; Sadreev, A. F.; Садреев, Алмаз Фаттахович
}
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7.


    Berman, G. P.
    Quasiclassical perturbation-theory for quantum k-systems / G. P. Berman, A. M. Iomin // Phys. Lett. A. - 1983. - Vol. 95, Is. 2. - P. 79-81, DOI 10.1016/0375-9601(83)90144-5. - Cited References: 6 . - ISSN 0375-9601
РУБ Physics, Multidisciplinary


WOS,
Scopus
Держатели документа:
Kirensky Institute of Physics, Siberian Department, the Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
ИФ СО РАН
Доп.точки доступа:
Iomin, A. M.; Берман, Геннадий Петрович
}
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8.


    Berman, G. P.
    Structure and stability of the quasi-energy spectrum of 2 interacting quantum non-linear resonances / G. P. Berman, A. R. Kolovsky // Phys. Lett. A. - 1983. - Vol. 95, Is. 1. - P. 15-18, DOI 10.1016/0375-9601(83)90768-5. - Cited References: 5 . - ISSN 0375-9601
РУБ Physics, Multidisciplinary


WOS
Доп.точки доступа:
Kolovsky, A. R.; Коловский, Андрей Радиевич; Берман, Геннадий Петрович
}
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9.


    Berman, G. P.
    Quantum mappings and the problem of stochasticity in quantum-systems / G. P. Berman, G. M. Zaslavsky // Physica A. - 1982. - Vol. 111, Is. 1-2. - P. 17-44, DOI 10.1016/0378-4371(82)90081-4. - Cited References: 20 . - ISSN 0378-4371
РУБ Physics, Multidisciplinary


WOS
Доп.точки доступа:
Zaslavsky, G. M.; Заславский, Георгий Моисеевич; Берман, Геннадий Петрович
}
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10.


   
    Dissipative chaos in semiconductor superlattices / K. N. Alekseev [et al.] // Phys. Rev. B. - 1996. - Vol. 54, Is. 15. - P. 10625-10636, DOI 10.1103/PhysRevB.54.10625. - Cited References: 89 . - ISSN 0163-1829
РУБ Physics, Condensed Matter
Рубрики:
NEGATIVE DIFFERENTIAL CONDUCTIVITY
   INJECTED SIGNAL

   BLOCH OSCILLATIONS

   COLLECTIVE EXCITATIONS

   DETERMINISTIC CHAOS

   MINIBAND TRANSPORT

   SURFACE-PLASMONS

   TIME-SERIES

   LASER

   VELOCITY

Аннотация: We consider the motion of ballistic electrons in a miniband of a semiconductor superlattice (SSL) under the influence of an external, time-periodic electric field. We use a semiclassical, balance-equation approach, which incorporates elastic and inelastic scattering (as dissipation) and the self-consistent field generated by the electron motion. The coupling of electrons in the miniband to the self-consistent held produces a cooperative nonlinear oscillatory mode which, when interacting with the oscillatory external field and the intrinsic Bloch-type oscillatory mode, can lead to complicated dynamics, including dissipative chaos. For a range of values of the dissipation parameters we determine the regions in the amplitude-frequency plane of the external field in which chaos can occur. Our results suggest that for terahertz external fields of the amplitudes achieved by present-day free-electron lasers, chaos may be observable in SSL's. We clarify the nature of this interesting nonlinear dynamics in the superlattice-external-field system by exploring analogies to the Dicke model of an ensemble of two-level atoms coupled with a resonant cavity field, and to Josephson junctions.

WOS
Держатели документа:
LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545
LV KIRENSKII INST PHYS,KRASNOYARSK 660036,RUSSIA
UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801
ИФ СО РАН

Доп.точки доступа:
Alekseev, K. N.; Berman, G. P.; Campbell, D. K.; Cannon, E. H.; Cargo, M. C.
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