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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Beloshapkin V. V., Zaslavsky G. M., Tretyakov A. G.
Заглавие : Effect of the interaction of distant atoms on the structural states of an atomic chain
Место публикации : Fiz. Nizk. Temp. - 1984. - Vol. 10, Is. 11. - P.1197-1205. - ISSN 0132-6414
Примечания : Cited References: 11
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : KAZANTSEV A. P., KRASNOV I. V.
Заглавие : DEEP POTENTIAL WELLS AND ROTATION OF ATOMS IN A LIGHT-FIELD
Место публикации : Phys. Lett. A: ELSEVIER SCIENCE BV, 1988. - Vol. 127, Is. 1. - P33-36. - ISSN 0375-9601, DOI 10.1016/0375-9601(88)90960-7
Примечания : Cited References: 15
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Malakhovskii A. V.
Заглавие : Magnetooptical activity of allowed electron transitions in atoms in free state and in crystals
Место публикации : Phys. Status Solidi B. - 1990. - Vol. 159, Is. 2. - P.883-892. - ISSN 0370-1972, DOI 10.1002/pssb.2221590236
Примечания : Cited References: 15
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : KRASNOV I. V.
Заглавие : STRAIGHTENING EFFECT OF RADIATION POWER AND LIGHT-INDUCED PHENOMENA OF TRANSFER IN RESONANCE GASES
Место публикации : Zhurnal Eksperimentalnoi Teor. Fiz.: MEZHDUNARODNAYA KNIGA, 1995. - Vol. 107, Is. 4. - P1135-1152. - ISSN 0044-4510
Примечания : Cited References: 18
Предметные рубрики: FORCE
ATOMS
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Berman G. P., Bulgakov E. N., Campbell D. K., Krive I. V.
Заглавие : Quantum nonlinear resonance and quantum chaos in Aharonov-Bohm oscillations in mesoscopic semiconductor rings
Место публикации : Phys. Rev. B: AMERICAN PHYSICAL SOC, 1997. - Vol. 56, Is. 16. - P10338-10354. - ISSN 0163-1829, DOI 10.1103/PhysRevB.56.10338
Примечания : Cited References: 51
Предметные рубрики: EXCITED HYDROGEN-ATOMS
FREQUENCY ELECTROMAGNETIC-FIELD
PERSISTENT CURRENTS
NORMAL-METAL
ENERGY SPACE
LOCALIZATION
TRANSPORT
LOOP
TIME
TRANSMISSION
Аннотация: We consider Aharonov-Bohm oscillations in a mesoscopic semiconductor ring threaded by both a constant magnetic flux and a time-dependent, resonant magnetic field with one or two frequencies. Working in the ballistic regime, we establish that the theory of ''quantum nonlinear resonance'' applies, and thus that this system represents a possible solid-state realization of ''quantum nonlinear resonance'' and ''quantum chaos.'' In particular, we investigate the behavior of the time-averaged electron energy at zero temperature in the regimes of (i) an isolated quantum nonlinear resonance and (ii) the transition to quantum chaos, when two quantum nonlinear resonances overlap. The time-averaged energy exhibits sharp resonant behavior as a function of the applied constant magnetic flux, and has a staircase dependence on the amplitude of the external time-dependent field. In the chaotic regime, the resonant behavior exhibits complex structure as a function of flux and frequency. We compare and contrast the quantum chaos expected in these mesoscopic ''solid-state atoms'' with that observed in Rydberg atoms in microwave fields, and discuss the prospects for experimental observation of the effects we predict.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Alekseev K. N., Perina J.
Заглавие : Light squeezing at the transition to quantum chaos
Место публикации : Phys. Rev. E: AMERICAN PHYSICAL SOC, 1998. - Vol. 57, Is. 4. - P4023-4034. - ISSN 1063-651X, DOI 10.1103/PhysRevE.57.4023
Примечания : Cited References: 62
Предметные рубрики: HIGHLY-EXCITED ATOMS
ELECTROMAGNETIC-FIELD
ANHARMONIC-OSCILLATOR
MICROWAVE IONIZATION
MONOCHROMATIC-FIELD
CLASSICAL MECHANICS
PERIODIC-ORBITS
RYDBERG ATOMS
HYDROGEN-ATOM
SYSTEMS
Аннотация: We investigate theoretically the dynamics of squeezed state generation in nonlinear systems possessing a transition from regular to chaotic dynamics in the limit of a large number of photons. As an example, the model of a kicked Kerr oscillator is considered. We show that at the transition to quantum chaos the maximum possible degree of squeezing increases exponentially in time, in contrast to the regular dynamics, where the degree of squeezing increases only powerwise in time. We demonstrate the one-to-one correspondence of the degree of squeezing and the value of the local Lyapunov instability rate in the corresponding classical chaotic system.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gluck M., Kolovsky A. R., Korsch H. J.
Заглавие : Bloch particle in the presence of dc and ac fields
Место публикации : Phys. Lett. A: ELSEVIER SCIENCE BV, 1998. - Vol. 249, Is. 5-6. - P483-488. - ISSN 0375-9601, DOI 10.1016/S0375-9601(98)00763-4
Примечания : Cited References: 21
Предметные рубрики: DYNAMIC LOCALIZATION
ELECTRONS
ATOMS
Ключевые слова (''Своб.индексиров.''): wannier-bloch states--quantum chaos
Аннотация: In this Letter we study the metastable states of a Bloch particle in the presence of external ac and de fields. For the resonance condition between the period of the driving frequency and the Bloch period, the complex quasi-energies are numerically calculated for two qualitatively different regimes (quasi-regular and chaotic) of the system dynamics. For the chaotic regime an effect of quantum stabilization, which suppresses the classical decay mechanism, is found. This effect is demonstrated to be a kind of quantum phenomenon sensitive to the resonance condition. (C) 1998 Elsevier Science B.V.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gluck M., Kolovsky A. R., Korsch H. J.
Заглавие : Lifetime statistics for a Bloch particle in ac and dc fields
Место публикации : Phys. Rev. E: AMERICAN PHYSICAL SOC, 1999. - Vol. 60, Is. 1. - P247-258. - ISSN 1063-651X, DOI 10.1103/PhysRevE.60.247
Примечания : Cited References: 27
Предметные рубрики: DYNAMIC LOCALIZATION
QUANTUM
TRANSITION
SCATTERING
MATRICES
SYSTEMS
LADDER
STATES
ATOMS
LIGHT
Аннотация: We study the statistics of the Wigner delay time and resonance width for a Bloch particle in ac and de fields in the regime of quantum chaos. It is shown that after appropriate rescaling the distributions of these quantities have a universal character predicted by the random matrix theory of chaotic scattering. [s1063-651X(99)09907-9].
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Alekseev K. N., Alekseeva N. V., Perina J.
Заглавие : Quantum-classical correspondence and nonclassical state generation in dissipative quantum optical systems
Место публикации : J. Exp. Theor. Phys.: AMER INST PHYSICS, 2000. - Vol. 90, Is. 4. - P592-599. - ISSN 1063-7761, DOI 10.1134/1.559142
Примечания : Cited References: 32
Предметные рубрики: 2ND-HARMONIC GENERATION
STATISTICAL PROPERTIES
HARMONIC-GENERATION
SQUEEZED STATES
CHAOS
LIGHT
NONLINEARITIES
INSTABILITIES
DYNAMICS
ATOMS
Аннотация: We develop a semiclassical method to determine the nonlinear dynamics of dissipative quantum optical systems in the limit of large number of photons N; it is based on the 1/N-expansion and the quantum-classical correspondence. The method is used to tackle two problems: the study of the dynamics of nonclassical state generation in higher order anharmonic dissipative oscillators and the establishment of the difference between the quantum and classical dynamics of the second-harmonic generation in a self-pulsing regime. In addressing the first problem, we obtain an explicit time dependence of the squeezing and the Fano factor for an arbitrary degree of anharmonism in the short-time approximation. For the second problem, we analytically find a characteristic time scale at which the quantum dynamics differs insignificantly from the classical one. (C) 2000 MAIK "Nauka/Interperiodica".
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popov A. K., Myslivets S. A., Gao J. Y., Zhang H. Z., Wellegehausen B.
Заглавие : Inversionless gain in a three-level system driven by a strong field and collisions
Место публикации : Chin. Phys. - 2000. - Vol. 9, Is. 2. - P.124-130. - ISSN 1009-1963
Примечания : Cited References: 45
Предметные рубрики: ELECTROMAGNETICALLY INDUCED TRANSPARENCY
POPULATION-INVERSION
LIGHT AMPLIFICATION
QUANTUM COHERENCE
REFRACTIVE-INDEX
LASER
INTERFERENCE
TRANSITIONS
SODIUM
ATOMS
Аннотация: Inversionless gain in a degenerate three-level system driven by a strong external field and by collisions with a buffer gas is investigated. The mechanism of population distribution in upper laser level, contributed by the collision transfer, as well as by relaxation, induced by pressure of a buffer gas, is discussed in detail. Explicit formulae for analysis of optimal conditions are derived. The idea developed here for the incoherent pump could be generalized to other systems.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nasluzov V. A., Rivanenkov V. V., Gordienko A. B., Neyman K. M., Birkenheuer U., Rosch N.
Заглавие : Cluster embedding in an elastic polarizable environment: Density functional study of Pd atoms adsorbed at oxygen vacancies of MgO(001)
Место публикации : J. Chem. Phys.: AMER INST PHYSICS, 2001. - Vol. 115, Is. 17. - P8157-8171. - ISSN 0021-9606, DOI 10.1063/1.1407001
Примечания : Cited References: 88
Предметные рубрики: TRANSITION-METAL ATOMS
AB-INITIO
OXIDE SURFACES
ELECTRONIC-PROPERTIES
ENERGY CALCULATIONS
MOLECULAR-DYNAMICS
MOTT-LITTLETON
MADELUNG FIELD
IONIC-CRYSTAL
MGO
Ключевые слова (''Своб.индексиров.''): atoms--binding energy--computer simulation--electron energy levels--electronic structure--magnesia--oxygen--palladium--polarization--probability density function--quantum theory--relaxation processes--charged defects--cluster embedding--elastic polarizable environment--electron affinity--oxygen vacancies--adsorption
Аннотация: Adsorption complexes of palladium atoms on F-s, F-s(+), F-s(2+), and O2- centers of MgO(001) surface have been investigated with a gradient-corrected (Becke-Perdew) density functional method applied to embedded cluster models. This study presents the first application of a self-consistent hybrid quantum mechanical/molecular mechanical embedding approach where the defect-induced distortions are treated variationally and the environment is allowed to react on perturbations of a reference configuration describing the regular surface. The cluster models are embedded in an elastic polarizable environment which is described at the atomistic level using a shell model treatment of ionic polarizabilities. The frontier region that separates the quantum mechanical cluster and the classical environment is represented by pseudopotential centers without basis functions. Accounting in this way for the relaxation of the electronic structure of the adsorption complex results in energy corrections of 1.9 and 5.3 eV for electron affinities of the charged defects F-s(+) and F-s(2+), respectively, as compared to models with a bulk-terminated geometry. The relaxation increases the stability of the adsorption complex Pd/F-s by 0.4 eV and decreases the stability of the complex Pd/F-s(2+) by 1.0 eV, but it only weakly affects the binding energy of Pd/F-s(+). The calculations provide no indication that the metal species is oxidized, not even for the most electron deficient complex Pd/F-s(2+). The binding energy of the complex Pd/O2- is calculated at -1.4 eV, that of the complex Pd/F-s(2+) at -1.3 eV. The complexes Pd/F-s and Pd/F-s(+) exhibit notably higher binding energies, -2.5 and -4.0 eV, respectively; in these complexes, a covalent polar adsorption bond is formed, accompanied by donation of electronic density to the Pd 5s orbital. (C) 2001 American Institute of Physics.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuzubov A. A., Avramov P. V., Ovchinnikov S. G., Varganov S. A., Tomilin F. N.
Заглавие : Electronic and atomic structures of the isomers of endohedral and exohedral fullerene complexes with two lithium atoms
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2001. - Vol. 43, Is. 9. - P1794-1799. - ISSN 1063-7834, DOI 10.1134/1.1402242
Примечания : Cited References: 21
Предметные рубрики: VIBRATION-ROTATION BANDS
INFRARED ROTATION
C-60
BUCKMINSTERFULLERENE
ION
Аннотация: The electronic structures of all the possible isomers of endohedral and exohedral C(60) fullerene complexes with two lithium atoms are theoretically investigated. It is found that the electronic structures of these compounds are characterized by an impurity filled-level state determining the band gap. The location of the impurity state and, correspondingly, the band gap of the exohedral fullerene complexes depend on the coordination mode and the distance between the alkali metal ions. A similar dependence is observed for the total energy of the exohedral fullerene complex under investigation. (C) 2001 MAIK "Nauka/ Interperiodica".
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krasnov I. V., Polyutov S. P.
Заглавие : Confinement of atoms with nondegenerate ground states in a three-dimensional dissipative optical superlattice
Разночтения заглавия :авие SCOPUS: Confinement of Atoms with Nondegenerate Ground States in a Three-Dimensional Dissipative Optical Superlattice
Место публикации : JETP Letters. - 2002. - Vol. 76, Is. 5. - P.270-274. - ISSN 0021-3640, DOI 10.1134/1.1520619
Примечания : Cited References: 15
Предметные рубрики: RADIATION-PRESSURE
FORCE
Аннотация: Based on the developed kinetic theory of rectified radiative forces, we found sufficient conditions for purely optical (nonmagnetic) three-dimensional confinement and cooling of atoms with the J = 0 -- J = 1 quantum transition in a weak field of mutually orthogonal bichromatic standing waves. We show that a deep stable atom localization of atoms in the cells of an effective light superlattice (with a spacing much larger than the light wavelength) can be achieved by controlling the phase shifts (time-difference phase) of the temporal oscillations in orthogonally polarized field components and by specially choosing the field parameters. The proposed scheme of purely optical confinement can be directly used for a large group of atoms like Yb isotopes and alkali-earth elements with even-even nuclei. (C) 2002 MAIK "Nauka / Interperiodica".
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolovsky A. R.
Заглавие : New Bloch period for interacting cold atoms in 1D optical lattices
Место публикации : Phys. Rev. Lett.: AMER PHYSICAL SOC, 2003. - Vol. 90, Is. 21. - Ст.213002. - ISSN 0031-9007, DOI 10.1103/PhysRevLett.90.213002
Примечания : Cited References: 19
Предметные рубрики: QUANTUM
TRANSITION
SUPERFLUID
INSULATOR
Аннотация: This paper studies Bloch oscillations of ultracold atoms in an optical lattice, in the presence of atom-atom interactions. A new, interaction-induced Bloch period is identified. Analytical results are corroborated by realistic numerical calculations.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bulgakov E. N., Sadreev A. F.
Заглавие : Vortex phase diagram of F=1 spinor Bose-Einstein condensates
Место публикации : Phys. Rev. Lett.: AMERICAN PHYSICAL SOC, 2003. - Vol. 90, Is. 20. - Ст.200401. - ISSN 0031-9007, DOI 10.1103/PhysRevLett.90.200401
Примечания : Cited References: 15
Предметные рубрики: ATOMS
CREATION
GASES
Аннотация: We have calculated the F=1 ground state of a spinor Bose-Einstein condensate trapped harmonic potential with an applied Ioffe-Pitchard magnetic field. The vortex phase diagram is found in the plane spanned by perpendicular and longitudinal magnetic fields. The ferromagnetic condensate has two vortex phases which differ by winding number in the spinor components. The two vortices for the F-z=-1 antiferromagnetic condensate are separated in space. Moreover, we considered an average local spin \[(S) over right arrow]\ to testify to what extent it is parallel to magnetic field (the nonadiabatic effects). We have shown that the effects are important at vortex cores.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolovsky A. R., Buchleitner A.
Заглавие : Floquet-Bloch operator for the Bose-Hubbard model with static field
Место публикации : Phys. Rev. E: AMER PHYSICAL SOC, 2003. - Vol. 68, Is. 5. - Ст.56213. - ISSN 1539-3755, DOI 10.1103/PhysRevE.68.056213
Примечания : Cited References: 23
Предметные рубрики: QUANTUM CHAOS
CONDENSATE
ATOMS
Аннотация: This paper deals with the spectral properties of the one-dimensional Bose-Hubbard Hamiltonian amended by an external static field-a model for cold spinless atoms loaded in a quasi-one-dimensional optical lattice and subject to an additional static (for example, gravitational) force. The analysis is performed in terms of the Floquet-Bloch operator, defined as the evolution operator of the system over one Bloch period. Depending on the particular choice of parameters, the spectrum is found to be either regular or chaotic. Moreover, in the chaotic case, the matrix of the Floquet-Bloch operator is well characterized as a random matrix of the circular orthogonal ensemble.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolovsky A. R., Buchleitner A.
Заглавие : Quantum chaos in the Bose-Hubbard model
Место публикации : Europhys. Lett. - 2004. - Vol. 68, Is. 5. - P.632-638. - ISSN 0295-5075, DOI 10.1209/epl/i2004-10265-7
Примечания : Cited References: 22
Предметные рубрики: EINSTEIN CONDENSATE
DOUBLE-WELL
TRANSITION
SUPERFLUID
INSULATOR
ATOMS
Аннотация: We present a numerical study of the spectral properties of the 1D Bose-Hubbard model. Unlike the 1D Hubbard model for fermions, this system is found to be non-integrable, and exhibits Wigner-Dyson spectral statistics under suitable conditions.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolovsky A. R.
Заглавие : Interference of cold atoms released from an optical lattice
Место публикации : Europhys. Lett. - 2004. - Vol. 68, Is. 3. - P.330-336. - ISSN 0295-5075, DOI 10.1209/epl/i2004-10212-8
Примечания : Cited References: 7
Предметные рубрики: BOSE-EINSTEIN CONDENSATE
QUANTUM PHASE
Аннотация: We study interference of the cold atoms which are released out of the quasi one- dimensional optical lattice, for the different initial states of the system. In particular, in the case of the Mott- insulator initial state, the atomic- density distribution is shown to exhibit a non- trivial interference pattern, similar to that observed for BEC in double- well potential in the experiment by Andrews et al. ( Science, 275 ( 1997) 637).
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Slabko V. V., Khachatryan G. G., Aleksandrovsky A. S.
Заглавие : Self-organized aggregation of small metal particles controlled by an external light field
Место публикации : JETP Letters. - 2006. - Vol. 84, Is. 6. - P.300-304. - ISSN 0021-3640, DOI 10.1134/S0021364006180056
Примечания : Cited References: 16
Предметные рубрики: CLUSTERS
ATOMS
Аннотация: Using simplest two- and three-particle models, it is shown that there exists a possibility of controlled aggregation of silver nanoparticles in an external light field. The aggregation occurs as a result of the dipole-dipole interaction of particles, whose energy has a minimum at a certain particle configuration and at corresponding frequency and polarization of the field.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ponomarev A. V., Kolovsky A. R.
Заглавие : Dipole and Bloch oscillations of cold atoms in a parabolic lattice
Место публикации : Laser Physics. - 2006. - Т. 16, № 2. - P.367-370. - ISSN 1054-660X, DOI 10.1134/S1054660X06020289. - ISSN 1555-6611(eissn)
Аннотация: The paper studies the dynamics of a Bose–Einstein condensate loaded in a 1D parabolic optical lat tice and excited by a sudden shifting of the lattice center. Depending on the initial shift, this dynamics is either the dipole or Bloch oscillations of the atoms. The effects of the dephasing and atom–atom interactions on the above atomic oscillations are discussed.
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