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Kudashkin, K.
Spectral properties of the Bose-Hubbard model within the cluster perturbation theory in X-operators representation / K. Kudashkin, S. Nikolaev, S. Ovchinnikov // J. Supercond. Nov. Magn. - 2017. - Vol. 30, Is. 1. - P. 103-107, DOI 10.1007/s10948-016-3781-y. - Cited References:16. - This work was supported by RFBR grant 16-02-00098, Government of Krasnoyarsk Territory and RFBR according to the research projects 16-42-243048, 16-42-240511, and 16-42-240769, and the Russian President Grant NSh-7559.2016.2. . - ISSN 1557-1939. - ISSN 1557-1947

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
TRANSITION
   SUPERFLUID
   INSULATOR
   ATOMS
Кл.слова (ненормированные):
Bose-Hubbard model -- Ultracold gases -- Cluster perturbation theory -- Density of states -- Spectral properties
Аннотация: We study the two-dimensional ultracold Bose gas in optical lattice. We use cluster perturbation theory based on Hubbard X-operators to calculate the spectral function and phase diagram of Bose-Hubbard model which is minimal model to describe behavior of ultracold gases in optical lattices. We have analyzed spectral properties of spinless bosons in a square lattice taking into account the short-range correlation.

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Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; RFBR [16-02-00098, 16-42-243048, 16-42-240511, 16-42-240769]; Government of Krasnoyarsk Territory; Russian President Grant [NSh-7559.2016.2]
}
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Kolovsky, A. R.
Bogoliubov depletion of the fragmented condensate in the bosonic flux ladder / A. R. Kolovsky // Phys. Rev. A. - 2017. - Vol. 95, Is. 3. - Ст. 033622, DOI 10.1103/PhysRevA.95.033622. - Cited References: 31. - The author acknowledges discussions with A. Eckardt, the hospitality of MPIPKS in Dresden, and financial support from Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, and Krasnoyarsk Region Science and Technology Support Fund through Grant No. 16-42-240746. . - ISSN 1050-2947
Кл.слова (ненормированные):
Bosons -- Crystal lattices -- Ladders -- Optical lattices -- Bogoliubov -- Dispersion relations -- Interacting bosons -- Ultracold atoms -- Ground state
Аннотация: We theoretically analyze the ground state of weakly interacting bosons in the flux ladder - the system that has been recently realized by means of ultracold atoms in the specially designed optical lattice [M. Atala, M. Aidelsburger, M. Lohse, J. T. Barreiro, B. Paredes, and I. Bloch, Nat. Phys. 10, 588 (2014)1745-247310.1038/nphys2998]. It is argued that, for the system parameters corresponding to two degenerate minima in the Bloch dispersion relation, the ground state is a fragmented condensate. We study the Bogoliubov depletion of this condensate and discuss the role of boundary conditions. © 2017 American Physical Society.

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Коловский, Андрей Радиевич
}
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Kolovsky, A. R.
Mott-insulator state of cold atoms in tilted optical lattices: Doublon dynamics and multilevel Landau-Zener tunneling / A. R. Kolovsky, D. N. Maksimov // Phys. Rev. A. - 2016. - Vol. 94, Is. 4. - Ст. 043630, DOI 10.1103/PhysRevA.94.043630. - Cited References: 34 . - ISSN 1050-2947
Кл.слова (ненормированные):
Crystal lattices -- Optical materials -- Analytical expressions -- Cold atoms -- Doublons -- Dynamical response -- In-laboratory experiments -- Landau zener tunneling -- Mott insulator state -- Optical lattices
Аннотация: We discuss the dynamical response of strongly interacting Bose atoms in an adiabatically tilted optical lattice. The analysis is performed in terms of the multilevel Landau-Zener tunneling. Different regimes of tunneling are identified and analytical expressions for the doublon number, which is the quantity measured in laboratory experiments, are derived. © 2016 American Physical Society.

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

Доп.точки доступа:
Maksimov, D. N.; Максимов, Дмитрий Николаевич; Коловский, Андрей Радиевич
}
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Beloshapkin, V. V.
Effect of the interaction of distant atoms on the structural states of an atomic chain / V. V. Beloshapkin, G. M. Zzaslavsky, A. G. Tretyakov // Fiz. Nizk. Temp. - 1984. - Vol. 10, Is. 11. - P. 1197-1205. - Cited References: 11 . - ISSN 0132-6414

РУБ Physics, Applied

WOS
Доп.точки доступа:
Zaslavsky, G. M.; Заславский, Георгий Моисеевич; Tretyakov, A. G.; Третьяков, Александр Григорьевич; Белошапкин, Валерий Васильевич
}
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Kolovsky, A. R.
Wave-packet dynamics of cold atoms in 2D lattices subject to synthetic magnetic and electric fields / A. Kolovsky // Modern problems of laser physics : матер. симп. - Новосибирск : ЗАО ИПП "Офсет", 2016. - P. 258

РИНЦ,
Материалы чсимпозиума,
Материалы симпозиума

Доп.точки доступа:
Коловский, Андрей Радиевич; International symposium and school for young scientist "Modern problems of laser physics"(7 ; )(2016 ; 22.08 - 28.08 ; Novosibirsk)Международный симпозиум и школа для молодых ученых "Современные проблемы лазерной физики"(7 ; )(2016 ; 22.08 - 28.08 ; Новосибирск); Институт лазерной физики Сибирского отделения РАН; Новосибирский государственный университет; Институт спектроскопии РАН; Московский государственный университет им. М.В. Ломоносова; Всероссийский научно-исследовательский институт физико-технических и радиотехнических измерений
Нет сведений об экземплярах (Источник в БД не найден)
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Arkhipkin, V. G.
One- and two-dimensional Raman-induced diffraction gratings in atomic media / V. G. Arkhipkin, S. A. Myslivets // Phys. Rev. A. - 2018. - Vol. 98, Is. 1. - Ст. 013838, DOI 10.1103/PhysRevA.98.013838. - Cited References: 37 . - ISSN 2469-9926. - ISSN 2469-9934

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
ELECTROMAGNETICALLY INDUCED TRANSPARENCY
COLD ATOMS
ABSORPTION
Аннотация: We propose and analyze an efficient scheme for the one- and two-dimensional atomic gratings based on periodic spatial modulation of the Raman gain and dispersion, which we name the Raman-induced diffraction gratings (RIDGs). There are fundamentally different from those based on electromagnetically induced transparency. As the probe field propagates along the direction normal to the standing pump wave, it can be effectively diffracted into high-order directions. The grating is a hybrid grating, i.e. it represents a mixture of amplitude and phase gratings. We identify the conditions when all high-order diffractions are amplified. In addition, we also show that diffraction of a probe field could be dynamically controlled using an additional laser field. With its help, it is possible to suppress or amplify diffraction beams. The RIDGs can be considered as all-optical multibeam splitters with amplification.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Myslivets, S. A.; Мысливец, Сергей Александрович; Архипкин, Василий Григорьевич
}
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Kolovsky, A. R.
Wannier-Stark states and topological phase transitions in tilted two-dimensional bipartite lattices / A. R. Kolovsky // Humboldt Kolleg. Controlling quantum matter: From ultracold atoms to solids : conference materials. - 2018

Материалы конференции,
Смотреть тезисы

Доп.точки доступа:
Коловский, Андрей Радиевич; Controlling quantum matter: From ultracold atoms to solids, Humboldt Kolleg(2018 ; July 29 - August 2 ; Vilnius, Lithuania)Vilnius University; Lithuanian Physical Society
}
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Bychek, A. A.
NOON state of Bose atoms in the double-well potential via an excited-state quantum phase transition / A. A. Bychek, D. N. Maksimov, A. R. Kolovsky // Phys. Rev. A. - 2018. - Vol. 97, Is. 6. - Ст. 063624, DOI 10.1103/PhysRevA.97.063624. - Cited References: 60. - The authors acknowledge financial support from the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory and the Krasnoyarsk Region Science and Technology Support Fund through Grant No. 16-42-240746. . - ISSN 2469-9926. - ISSN 2469-9934

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
EINSTEIN CONDENSATE
   SUPERPOSITION STATES
   NOBEL LECTURE
   ENTANGLEMENT
Аннотация: We suggest a simple scheme for creating a NOON state of repulsively interacting Bose atoms in the double-well potential. The protocol consists of two steps. First, by setting atom-atom interactions to zero, the system is driven to the upper excited state. Second, the interactions are slowly increased and, simultaneously, the interwell tunneling is decreased to zero. We analyze fidelity of the final state to the NOON state depending on the number of atoms, ramp rate, and fluctuations of the system parameters. It is shown that for a given fidelity the ramp rate scales algebraically with the number of atoms.

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Держатели документа:
RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.

Доп.точки доступа:
Maksimov, D. N.; Максимов, Дмитрий Николаевич; Kolovsky, A. R.; Коловский, Андрей Радиевич; Бычек, Анна Андреевна; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory; Krasnoyarsk Region Science and Technology Support Fund [16-42-240746]
}
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    Structure and magnetic properties of titanium nickelide nanoparticles synthesized by pulsed laser ablation method / A. K. Drozdova [et al.] // J. Phys. Conf. Ser. - 2017. - Vol. 857, Is. 1. - Ст. 012007, DOI 10.1088/1742-6596/857/1/012007. - Cited References: 9 . - ISSN 1742-6588
   Перевод заглавия: Структура и магнитные свойства наночастиц никелида титана, синтезированных методом импульсной лазерной абляции
Кл.слова (ненормированные):
Ablation -- Coatings -- High resolution transmission electron microscopy -- Laser ablation -- Nanomagnetics -- Nanoparticles -- Synthesis (chemical) -- Titanium -- Transmission electron microscopy -- Equiatomic composition -- Magnetization values -- Ti atoms -- Titanium nickelide -- Pulsed lasers
Аннотация: We have successfully synthesized magnetic titanium nickelide nanoparticles with equiatomic composition by pulsed laser ablation method. Using transmission electron microscopy and microanalysis was revealed that particles represent the homogeneous conglomerates containing identical amount of Ni and Ti atoms. The magnetization value of nanoparticles was estimated.

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Доп.точки доступа:
Drozdova, A. K.; Cherepanov, V. N.; Svetlichny, V. A.; Kveglis, L. I.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; International Conference on Films and Coatings(13 ; 18-20 April 2017 ; St. Petersburg)
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10.

Kolovsky, A. R.
Microscopic models of source and sink for atomtronics / A. R. Kolovsky // Phys. Rev. A. - 2017. - Vol. 96, Is. 1. - Ст. 011601, DOI 10.1103/PhysRevA.96.011601. - Cited References:26. - The author acknowledges financial support from the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, and Krasnoyarsk Region Science and Technology Support Fund through Grant No. 16-42-240746. . - ISSN 2469-9926. - ISSN 2469-9934

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
BOSE-HUBBARD MODEL
   ANDERSON LOCALIZATION
   BLOCH OSCILLATIONS
   ATOMS
Аннотация: We analyzemicroscopic models of the particle source or sink which consist of a one- or two-site Bose-Hubbard model (the system) weakly coupled to amany-site Bose-Hubbard model (the reservoir). Assuming unequal filling factors for the system and reservoir, we numerically study equilibration dynamics and compare it with the solution of the master equation on the reduced density matrix of the system. Necessary conditions for the validity of the master equation approach are formulated.

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Держатели документа:
Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Коловский, Андрей Радиевич; Russian Foundation; Government of Krasnoyarsk Territory; Krasnoyarsk Region Science and Technology Support Fund [16-42-240746]
}
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11.

Avramov, P. V.
Mechanisms of inelastic scattering of low-energy protons by C6H6, C-60, C6F12, and C60F48 molecules / P. V. Avramov, B. I. Yakobson, G. E. Scuseria // Phys. Solid State. - 2006. - Vol. 48, Is. 1. - P. 177-184, DOI 10.1134/S106378340601032X. - Cited References: 23 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
DYNAMICS SIMULATIONS
   FULLERENES
   COMPLEXES
   BUCKMINSTERFULLERENE
   HELIUM
   ATOMS
Аннотация: The mechanisms of inelastic scattering of low-energy protons with a kinetic energy of 2-7 eV by C6H6, C6F12, C-60, and C60F48 molecules are studied using the methods of quantum chemistry and nonempirical molecular dynamics. It is shown that, for the C6H6 + proton and C-60 + proton systems, starting from a distance of 6 angstrom from the carbon skeleton, the electronic charge transfer from the aromatic molecule to H+ occurs with a probability close to unity and transforms the H+ ion into a hydrogen atom and the neutral C6H6 and C-60 molecules into cation radicals. The mechanism of interaction of low-energy protons with C6F12 and C60F48 molecules has a substantially different character and can be considered qualitatively as the interaction between a neutral molecule and a point charge. The Coulomb perturbation of the system arising from the interaction of the noncompensated proton charge with the Mulliken charges of fluorine atoms results in an inversion of the energies of the electronic states localized, on the one hand, on the positively charged hydrogen ion and, on the other hand, on the C6F12 and C60F48 molecules. As a result, the neutral molecule + proton state becomes the ground state. In turn, this inversion makes the electronic charge transfer energetically unfavorable. Quantum-chemical and molecular-dynamics calculations on different levels of theory showed that, for fluorine derivatives of some aromatic structures (C6F12, C60F48), the barriers to proton penetration through carbon hexagons are two to four times lower than for the corresponding parent systems (C6H6, C-60). This effect is explained by the absence of active pi-electrons in the case of fluorinated molecules.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
Rice Univ, Ctr Biol & Environm Nanotechnol, Houston, TX 77005 USA
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Center for Biological and Environmental Nanotechnology, Rice University, Houston, TX 77005-1892, United States

Доп.точки доступа:
Yakobson, B. I.; Scuseria, G. E.; Аврамов, Павел Вениаминович
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12.

Malakhovskii, A. V.
Magnetooptical activity of allowed electron transitions in atoms in free state and in crystals / A. V. Malakhovskii // Phys. Status Solidi B. - 1990. - Vol. 159, Is. 2. - P. 883-892, DOI 10.1002/pssb.2221590236. - Cited References: 15 . - ISSN 0370-1972

РУБ Physics, Condensed Matter

WOS
Доп.точки доступа:
Малаховский, Александр Валентинович
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13.

Density-functional model cluster studies of EPR g tensors of F-s(+) centers on the surface of MgO / C. . Di Valentin [et al.] // J. Chem. Phys. - 2006. - Vol. 124, Is. 4. - Ст. 44708, DOI 10.1063/1.2161190. - Cited References: 37 . - ISSN 0021-9606

РУБ Physics, Atomic, Molecular & Chemical
Рубрики:
ELECTRONIC G-TENSORS
   CORRELATION-ENERGY
   MGO(001) SURFACE
   OXYGEN VACANCIES
   SPIN-ORBIT
   G-VALUES
   ATOMS
   APPROXIMATION
   COMPLEXES
   MOLECULES
Кл.слова (ненормированные):
Density-functional model cluster -- Single-crystalline thin films -- Spin-orbit interaction -- Anisotropy -- Paramagnetic resonance -- Single crystals -- Tensors -- Thin films -- Magnesium compounds
Аннотация: We report g tensors of surface color centers, so-called F-s(+) centers, of MgO calculated with two density-functional approaches using accurately embedded cluster models. In line with recent UHV measurements on single-crystalline MgO film, we determined only small g-tensor anisotropies and negative shifts Delta g equivalent to g-g(e) for all F-s(+) sites considered, namely, (001)-terrace, step, edge, and corner sites. The g values are very sensitive to the local structure of the defect: relaxation reverses the sign of Delta g. However, accounting for the spin-orbit interaction either self-consistently or perturbatively yields very similar results. In addition to the values of the tensor components, their direction with respect to the surface was determined. In contrast to edges, significant deviations from ideal C-2v symmetry were found for F-s(+) centers at steps. Recent data on single-crystalline thin films are reevaluated in the light of these results. (c) 2006 American Institute of Physics.

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Держатели документа:
ICREA, Barcelona 08010, Spain
Univ Barcelona & Parc Cientif Barcelona, Dept Quim Fis, Barcelona 08028, Spain
Univ Barcelona & Parc Cientif Barcelona, Ctr Especial Recerca Quim Teor, Barcelona 08028, Spain
Max Planck Gesell, Fritz Haber Inst, Dept Phys Chem, D-14195 Berlin, Germany
Russian Acad Sci, Inst Chem & Chem Technol, Krasnoyarsk 660049, Russia
Univ Milan Bicocca, Dipartimento Sci Mat, I-20125 Milan, Italy
Tech Univ Munich, Dept Chem Theoret Chem, D-85747 Garching, Germany
ИХХТ СО РАН
Dipartimento di Scienza dei Materiali, Universit? degli Studi Milano-Bicocca, 20125 Milano, Italy
Institucio Catalana de Recerca i Estudis Avanats (ICREA), 08010 Barcelona, Spain
Departament de Quimica Fisisca, Centre Especial de Recerca en Quimica Teorica, Parc Cientific de Barcelona, 08028 Barcelona, Spain
Fritz-Haber Institut, Max-Planck Gesellschaft, Department of Chemical Physics, Faradayweg 4-6, D-14195 Berlin, Germany
Institute of Chemistry and Chemical Technology, Russian Academy of Sciences, 660049 Krasnoyarsk, Russian Federation
Department Chemie, Theoretische Chemie, Technische Universitat Munchen, 85747 Garching, Germany

Доп.точки доступа:
Di Valentin, C.; Neyman, K. M.; Risse, T.; Sterrer, M.; Fischbach, E.; Freund, H. J.; Nasluzov, V. A.; Pacchioni, G.; Rosch, N.
}
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14.

Slabko, V. V.
Self-organized aggregation of small metal particles controlled by an external light field / V. V. Slabko, G. G. Khachatryan, A. S. Aleksandrovsky // JETP Letters. - 2006. - Vol. 84, Is. 6. - P. 300-304, DOI 10.1134/S0021364006180056. - Cited References: 16 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
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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Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Krasnoyarsk State Tech Univ, Krasnoyarsk 660074, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk State Technical University, Krasnoyarsk, 660074, Russian Federation

Доп.точки доступа:
Khachatryan, G. G.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Слабко, Виталий Васильевич
}
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15.

Kolovsky, A. R.
Persistent current of atoms in a ring optical lattice / A. R. Kolovsky // New J. Phys. - 2006. - Vol. 8. - Ст. 197, DOI 10.1088/1367-2630/8/9/197. - Cited References: 22 . - ISSN 1367-2630

РУБ Physics, Multidisciplinary
Рубрики:
SUPERFLUIDITY
Кл.слова (ненормированные):
Fluid dynamics -- Random processes -- Spectrum analysis -- High energy spectra -- Quasimomentum -- Random matrix theory -- High energy physics
Аннотация: We consider a small ensemble of Bose atoms in a ring optical lattice with weak disorder. The atoms are assumed to be initially prepared in a superfluid state with nonzero quasimomentum and, hence, may carry matter current. It is found that the atomic current persists in time for a low value of the quasimomentum but decays exponentially for a high (around one quarter of the Brillouin zone) quasimomentum. The explanation is given in terms of low- and high-energy spectra of the Bose-Hubbard model, which we describe using the Bogoliubov and random matrix theories, respectively.

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Держатели документа:
Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Max-Planck-Institut fur Physik Komplexer Systeme, 01187 Dresden, Germany
Kirensky Institute of Physics, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Коловский, Андрей Радиевич
}
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16.

Inversionless gain in a three-level system driven by a strong field and collisions / A. K. Popov [et al.] // Chin. Phys. - 2000. - Vol. 9, Is. 2. - P. 124-130. - Cited References: 45 . - ISSN 1009-1963

РУБ Physics, Multidisciplinary
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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Держатели документа:
Russian Acad Sci, Inst Phys, Krasnoyarsk, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660036, Russia
Jilin Univ, Dept Phys, Changchun 130023, Peoples R China
Univ Hannover, Inst Quantenopt, D-30167 Hannover, Germany
ИФ СО РАН

Доп.точки доступа:
Popov, A. K.; Myslivets, S. A.; Мысливец, Сергей Александрович; Gao, J. Y.; Zhang, H. Z.; Wellegehausen, B.
}
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17.

KRASNOV, I. V.
STRAIGHTENING EFFECT OF RADIATION POWER AND LIGHT-INDUCED PHENOMENA OF TRANSFER IN RESONANCE GASES / I. V. KRASNOV // Zhurnal Eksperimentalnoi Teor. Fiz. - 1995. - Vol. 107, Is. 4. - P. 1135-1152. - Cited References: 18 . - ISSN 0044-4510

РУБ Physics, Multidisciplinary
Рубрики:
FORCE
ATOMS

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}
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18.

Electron-Phonon Interaction and Phonon Renormalization in the Lamellar Cobaltate NaxCoO2 / A. . Donkov [et al.] // J. Supercond. Nov. Magn. - 2009. - Vol. 22: International Conference on Quantum Phenomena in Complex Matters (JUL 26-AUG 01, 2008, Erice, ITALY), Is. 1. - P. 37-40, DOI 10.1007/s10948-008-0372-6. - Cited References: 16 . - ISSN 1557-1939

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
SUPERCONDUCTIVITY
Кл.слова (ненормированные):
Electron-phonon interaction -- Superconductivity -- Sodium cobaltate -- Electron-phonon interaction -- Sodium cobaltate -- Superconductivity -- Brillouin zones -- Cobaltate -- Conducting electrons -- Conduction electrons -- Doping dependences -- Feedback effects -- Matrix elements -- Phonon frequencies -- Phonon modes -- Raman experiments -- Renormalization -- Sodium cobaltate -- Sodium cobaltates -- Atoms -- Cobalt compounds -- Critical current density (superconductivity) -- Electric conductivity -- Electron-phonon interactions -- Electrons -- Flow interactions -- Penetration depth (superconductivity) -- Sodium -- Superconductivity -- Phonons
Аннотация: We study theoretically the electron-phonon interaction in NaxCoO2. For the A(1g) and E-1g phonon modes found in Raman experiments, we calculate the matrix elements of the electron-phonon interaction. Analyzing the feedback effect of the conduction electrons on the phonon frequency., we investigate the doping dependence of these two phonon modes. Due to the momentum dependence of the electron-phonon interaction, we find the strongest renormalization of the E-1g mode around the Brillouin zone boundary which should be observed in the neutron scattering. At the same time, the A(1g) mode shows the strongest coupling to the conducting electrons around the G point and reveals its doping dependence in the Raman experiments. Our results shed light on the possible importance of the electron-phonon interaction in the lamellar sodium cobaltates.

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Держатели документа:
[Donkov, A.
Eremin, I.
Knolle, J.
Korshunov, M. M.] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[Eremin, I.] TU Braunschweig, Inst Math & Theoret Phys, D-38106 Braunschweig, Germany
[Korshunov, M. M.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Max-Planck-Institut fur Physik Komplexer Systeme, Dresden 01187, Germany
Institute fur Mathematische und Theoretische Physik, TU Braunschweig, Braunschweig 38106, Germany
Siberian Branch, Russian Academy of Sciences, L.V. Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Donkov, A.; Eremin, I.; Knolle, J.; Korshunov, M. M.; Коршунов, Максим Михайлович
}
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19.

KAZANTSEV, A. P.
DEEP POTENTIAL WELLS AND ROTATION OF ATOMS IN A LIGHT-FIELD / A. P. KAZANTSEV, I. V. KRASNOV // Phys. Lett. A. - 1988. - Vol. 127, Is. 1. - P. 33-36, DOI 10.1016/0375-9601(88)90960-7. - Cited References: 15 . - ISSN 0375-9601

РУБ Physics, Multidisciplinary

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Scopus
Держатели документа:
ACAD SCI USSR,CTR COMP,KRASNOYARSK,USSR
ИВМ СО РАН
Доп.точки доступа:
KRASNOV, I. V.
}
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20.

Brownian dynamic of laser cooling and crystallization of electron-ion plasma / A. P. Gavriliuk [et al.] // Phys. Rev. E. - 2009. - Vol. 80, Is. 5. - Ст. 56404, DOI 10.1103/PhysRevE.80.056404. - Cited References: 29 . - ISSN 1539-3755

РУБ Physics, Fluids & Plasmas + Physics, Mathematical
Рубрики:
ULTRACOLD NEUTRAL PLASMAS
   OPTICAL MOLASSES
   LIQUIDS
   ATOMS
   TRAP
Кл.слова (ненормированные):
Brownian motion -- laser cooling -- plasma collision processes -- plasma light propagation -- plasma nonlinear processes -- plasma simulation -- plasma transport processes -- Brownian Dynamics -- Brownian dynamics simulations -- Electron ion plasma -- Electron subsystem -- Friction force -- Ionic structure -- Nonlinear dependence -- Plasma cooling -- Brownian movement -- Crystallization -- Ions -- Laser cooling -- Lasers -- Cooling
Аннотация: Laser cooling and crystallization of electron-ion plasma is studied using the Brownian dynamics simulation technique and taking into consideration the interaction of ions with the electron subsystem. It has been shown that the nonlinear dependence of laser friction force on the velocity of ions has to be taken into account in order to simulate in an adequate manner the cooling dynamics and obtain a correct estimate for minimum temperatures. It has been found that times required for formation of an ordered ionic structure can be much longer than the typical plasma cooling time.

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Держатели документа:
[Gavriliuk, A. P.
Krasnov, I. V.
Shaparev, N. Ya.] Russian Acad Sci, Inst Computat Modeling, Krasnoyarsk, Russia
[Isaev, I. L.
Karpov, S. V.] Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk, Russia
[Karpov, S. V.] Siberian Fed Univ, Krasnoyarsk, Russia
ИФ СО РАН
Institute of Computational Modeling, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
L.V. Kirenskiy Institute of Physics, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Gavriliuk, A. P.; Isaev, I. L.; Исаев, Иван Леонидович; Karpov, S. V.; Карпов, Сергей Васильевич; Krasnov, I. V.; Shaparev, N. Y.
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