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1.
Spontaneous dc current
generation in a resistively shunted semiconductor superlattice driven by a terahertz field / K. N. Alekseev [et al.]> // Phys. Rev. Lett. - 1998. -
Vol. 80
,
Is. 12
. - P. 2669-2672,
DOI
10.1103/PhysRevLett.80.2669. - Cited References: 21 . - ISSN 0031-9007
РУБ
Physics, Multidisciplinary
Рубрики:
DYNAMIC LOCALIZATION
BLOCH OSCILLATIONS
ELECTRIC-FIELD
THZ-FIELD
PENDULUM
CHAOS
TIME
SUPPRESSION
SYSTEMS
Аннотация:
We study a resistively shunted semiconductor superlattice subject to a high-frequency electric field. Using a balance equation approach that incorporates the influence of the electric circuit, we determine numerically a range of amplitude and frequency of the ac field for which a de bias and current are generated spontaneously and show that this region is likely accessible to current experiments. Our simulations reveal that the Bloch frequency corresponding to the spontaneous de bias is approximately an integer multiple of the ac field frequency.
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Держатели документа:
Univ Illinois, Dept Phys, Urbana, IL 61801 USA
NORDITA, DK-2100 Copenhagen O, Denmark
LV Kirensky Phys Inst, Theory Nonlinear Proc Lab, Krasnoyarsk 660036, Russia
Loughborough Univ Technol, Dept Phys, Loughborough LE11 3TU, Leics, England
ИФ СО РАН
Доп.точки доступа:
Alekseev, K. N.; Cannon, E. H.; McKinney, J. C.; Kusmartsev, F. V.; Campbell, D. K.
}
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2.
Alekseev, K. N.
Squeezed states and quantum chaos / K. N. Alekseev, D. S. Priimak> // J. Exp. Theor. Phys. - 1998. -
Vol. 86
,
Is. 1
. - P. 61-70,
DOI
10.1134/1.558469. - Cited References: 41 . - ISSN 1063-7761
РУБ
Physics, Multidisciplinary
Рубрики:
PERIODICALLY KICKED
PENDULUM
CLASSICAL CORRESPONDENCE
SYSTEMS
LIGHT
FLUCTUATIONS
OSCILLATOR
MECHANICS
MASER
Аннотация:
We examine the dynamics of a wave packet that initially corresponds to a coherent state in the model of a quantum rotator excited by a periodic sequence of kicks. This model is the main model of quantum chaos and allows for a transition from regular behavior to chaotic in the classical limit. By doing a numerical experiment we study the generation of squeezed states in quasiclassical conditions and in a time interval when quantum-classical correspondence is well-defined. We find that the degree of squeezing depends on the degree of local instability in the system and increases with the Chirikov classical stochasticity parameter. We also discuss the dependence of the degree of squeezing on the initial width of the packet, the problem of stability and observability of squeezed states in the transition to quantum chaos, and the dynamics of disintegration of wave packets in quantum chaos. (C) 1998 American Institute of Physics.
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Доп.точки доступа:
Priimak, D. S.
}
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3.
Unusual spontaneous twisting
of an (NH4)(2)SO4 crystal in a torsion
pendulum
below the Curie point / S. A. Gridnev [et al.]> // Phys. Solid State. - 2001. -
Vol. 43
,
Is. 4
. - P. 722-726,
DOI
10.1134/1.1366001. - Cited References: 17 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
FERROELECTRIC PHASE
Аннотация:
It is found that the ferroelectric phase transition in the ammonium sulphate crystal (NH4)(2)SO4 at T-C = 223 K is accompanied by spontaneous twisting of samples around the a, b, and c crystallographic axes in the ferroelectric phase. This twisting, observed with a torsion
pendulum
, cannot be explained solely by the change in symmetry mmm -- mm2 at the Curie point. It is supposed that the twisting is connected with a complex rearrangement of the structural elements of the crystalline lattice below the Curie temperature. (C) 2001 MAIK "Nauka/Interperiodica".
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Держатели документа:
Voronezh State Tech Univ, Voronezh 394026, Russia
Russian Acad Sci, Kirenskii Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Voronezh State Technical University, Moskovskii pr. 14, Voronezh, 394026, Russian Federation
Kirenskii Inst. of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Gridnev, S. A.; Ivanov, O. N.; Mikhailova, L. P.; Davydova, T. N.; Давыдова, Тамара Николаевна
}
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4.
Symmetry breaking in
a driven and strongly damped
pendulum
/ J. . Isohatala [et al.]> // Phys. Rev. E. - 2005. -
Vol. 71
,
Is. 6
. - Ст. 66206,
DOI
10.1103/PhysRevE.71.066206. - Cited References: 37 . - ISSN 1539-3755
РУБ
Physics, Fluids & Plasmas + Physics, Mathematical
Рубрики:
DC VOLTAGE GENERATION
SEMICONDUCTOR SUPERLATTICES
JOSEPHSON-JUNCTIONS
BLOCH OSCILLATIONS
FORCED
PENDULUM
CHAOS
FREQUENCY
SYSTEMS
RECTIFICATION
STANDARD
Кл.слова (ненормированные):
Periodically driven pendulums
--
Symmetry breaking
--
Bifurcation (mathematics)
--
Damping
--
Dynamics
--
Nonlinear systems
--
Semiconductor superlattices
--
Pendulums
Аннотация:
We examine the conditions for appearance of a symmetry breaking bifurcation in damped and periodically driven pendulums in the case of strong damping. We show that symmetry breaking, unlike other nonlinear phenomena, can exist at high dissipation. We prove that symmetry breaking phases exist between phases of symmetric normal and symmetric inverted oscillations. We find that symmetry broken solutions occupy a smaller region of the
pendulum
's parameter space in comparison to the statements made in earlier considerations [McDonald and Plischke, Phys. Rev. B 27, 201 (1983)]. Our research on symmetry breaking in a strongly damped
pendulum
is relevant to an understanding of the phenomena of dynamic symmetry breaking and rectification in pure ac driven semiconductor superlattices.
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Держатели документа:
Univ Oulu, Dept Phys Sci, FIN-90014 Oulu, Finland
LV Kirenskii Inst Phys, Theory Nonlinear Proc Lab, Krasnoyarsk 660036, Russia
ИФ СО РАН
Department of Physical Sciences, P. O. Box 3000, Oulu FIN-90014, Finland
Theory of Nonlinear Processes Laboratory, Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation
Доп.точки доступа:
Isohatala, J.; Alekseev, K. N.; Kurki, L. T.; Pietilainen, P.
}
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5.
Alekseev, K. N.
Pendulum
limit, chaos and phase-locking in the dynamics of ac-driven semiconductor superlattices / K. N. Alekseev, F. V. Kusmartsev> // Phys. Lett. A. - 2002. -
Vol. 305
,
Is. 5
. - P. 281-288,
DOI
10.1016/S0375-9601(02)01420-2. - Cited References: 60 . - ISSN 0375-9601
РУБ
Physics, Multidisciplinary
Рубрики:
STRANGE NONCHAOTIC ATTRACTORS
DC VOLTAGE GENERATION
JOSEPHSON-JUNCTIONS
GAAS/ALAS SUPERLATTICE
BLOCH OSCILLATIONS
TERAHERTZ RADIATION
ELECTRIC-FIELD
THZ RADIATION
FREQUENCY
TRANSPORT
Кл.слова (ненормированные):
semiconductor superlattice
--
pendulum
--
chaos
--
phase-locking
--
Josephson junction
--
Chaos
--
Josephson junction
--
Pendulum
--
Phase-locking
--
Semiconductor superlattice
--
analytic method
--
analytical parameters
--
article
--
dynamics
--
electric potential
--
semiconductor
--
temperature
Аннотация:
We describe a limiting case when nonlinear dynamics of an ac-driven semiconductor superlattice in the miniband transport regime is governed by a periodically forced and damped
pendulum
equations. We find analytically the conditions for a transition to chaos. With increasing temperature the chaos disappears. We also discuss fractional do voltage states in a superlattice originating from phase-locked states of the
pendulum
. (C) 2002 Elsevier Science B.V. All rights reserved.
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Держатели документа:
Oulu Univ, Dept Phys Sci, FIN-90014 Oulu, Finland
LV Kirenskii Inst Phys, Theory Nonlinear Proc Lab, Krasnoyarsk 660036, Russia
Loughborough Univ Technol, Dept Phys, Loughborough LE11 3TU, Leics, England
ИФ СО РАН
Department of Physical Sciences, University of Oulu, P.O. Box 3000, FIN-90014, Oulu, Finland
Theory of Nonlin. Proc. Laboratory, Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation
Department of Physics, Loughborough University, Loughborough LE11 3TU, United Kingdom
Доп.точки доступа:
Kusmartsev, F. V.
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