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    Maksimov, D. N.
    Escape dynamics of a Bose-Hubbard dimer out of a trap / D. N. Maksimov, A. R. Kolovsky // Phys. Rev. A. - 2014. - Vol. 89, Is. 6. - Ст. 063612, DOI 10.1103/PhysRevA.89.063612. - Cited References: 53. - The authors acknowledge financial support of Russian Academy of Sciences through the SB RAS integration project No. 29 Dynamics of Atomic Bose-Einstein Condensates in Optical Lattices. . - ISSN 1050-2947. - ISSN 1094-1622
   Перевод заглавия: Динамика туннелирования димера Бозе-Хаббарда из потенциальной ямы

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
ULTRACOLD GASES
   OPTICAL LATTICE
   QUANTUM
   DECAY
Аннотация: We consider a potential scattering of a Bose-Hubbard dimer in a one-dimensional optical lattice. A numerical approach based on an effective non-Hermitian Hamiltonian has been developed for solving the scattering problem. It allows us to compute the tunneling and dissociation probabilities for an arbitrary shape of the potential barrier and an arbitrary kinetic energy of the dimer. The developed approach has been used to address the problem of two-particle decay out of a trap. In particular, it is shown that the presence of dissociation channels significantly decreases the nonescape probability due to single-particle escape to those channels.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Kolovsky, A. R.; Коловский, Андрей Радиевич; Максимов, Дмитрий Николаевич; Russian Academy of Sciences [29]
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Vasil'ev, E. N.
Numerical simulation of interaction between arc discharge and transverse magnetic field / E. N. Vasil'ev, D. A. Nesterov // High Temp. - 2007. - Vol. 45, Is. 2. - P. 137-142, DOI 10.1134/S0018151X07020010. - Cited References: 12 . - ISSN 0018-151X

РУБ Physics, Applied

Кл.слова (ненормированные):
Flow of gases -- Gas dynamics -- Mathematical models -- Molecular interactions -- Velocity distribution -- Arc discharges -- Discharge column -- Magnetogasdynamics -- Magnetic fields
Аннотация: An unsteady-state three-dimensional numerical model of radiation magnetogasdynamics is used to calculate the structure of an arc discharae which interacts with an external transverse maonetic field and transverse gas flow. The velocity field and the distribution of gas temperature obtained as a result of calculations agree with experimental data. The difference between the calculated and measured values of temperature in the discharge column is approximately 5%.

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Держатели документа:
Russian Acad Sci, Siberian Div, Inst Computat Modeling, Krasnoyarsk 660036, Russia
ИВМ СО РАН
Institute of Computational Modeling, Siberian Division, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Nesterov, D. A.; Васильев, Евгений Николаевич
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Bulgakov, E. N.
Vortex phase diagram of F=1 spinor Bose-Einstein condensates / E. N. Bulgakov, A. F. Sadreev // Phys. Rev. Lett. - 2003. - Vol. 90, Is. 20. - Ст. 200401, DOI 10.1103/PhysRevLett.90.200401. - Cited References: 15 . - ISSN 0031-9007

РУБ Physics, Multidisciplinary
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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Держатели документа:
Russian Acad Sci, Inst Phys, Krasnoyarsk 660036, Russia
Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden
ИФ СО РАН

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
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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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LUKINYKH, V. F.
IMPULSE LASER SYSTEM ON GLASS WITH NEODYMIUM FOR THE STUDY OF NONLINEAR OPTICAL PHENOMENA IN GASES / V. F. LUKINYKH, S. A. MYSLIVETS, V. V. SLABKO // Zhurnal Tek. Fiz. - 1984. - Vol. 54, Is. 5. - P. 879-882. - Cited References: 7 . - ISSN 0044-4642

РУБ Physics, Applied

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Доп.точки доступа:
MYSLIVETS, S. A.; SLABKO, V. V.
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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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    The investigation of the influence of oxygen concentration in the gas mixture on nanodispersed oxides synthesis / I. V. Karpov [et al.] // IOP Conf. Ser.: Mater. Sci. Eng. - 2017. - Vol. 255, Is. 1. - Ст. 012008, DOI 10.1088/1757-899X/255/1/012008. - Cited References: 25
   Перевод заглавия: Исследование влияния концентрации кислорода в газовой смеси на синтез нанодисперсных оксидов
Кл.слова (ненормированные):
Cathodes -- Electrodes -- Particle size -- Vacuum applications -- Average particle size -- Cathode process -- Discharge gaps -- Energy of ions -- Influence of oxygen -- Low pressure arc -- Oxides synthesis -- Superheated gas -- Gases
Аннотация: Thermal effects in cathode space of low-pressure arc discharge, which contribute to the synthesis of nanopowders with an average particle size of less than 10 nm, are considered. One of the most important parameters, characterizing the cathode processes of vacuum arc, is a voltage drop across the discharge gap. All the gases demonstrate a decrease of a voltage drop across the discharge gap under the condition ofincreasing the gas pressure in the range of p = 10-3 - 1 Pa. Dissipation of energy of ions and electrons on gas molecules causes abrupt heating of the gas. Heat, coming from gas plasma, has a significant impact on evaporating material of a cathode. It can be assumed that a microdrop fraction, formed as a result of a cathode spraying in a liquid phase, will further evaporate in a superheated gas.

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Доп.точки доступа:
Karpov, I. V.; Ushakov, A. V.; Lepeshev, A. A.; Лепешев, Анатолий Александрович; Fedorov, L. Y.; Dorozhkina, E. A.; Karpova, O. N.; Shaikhadinov, A. A.; Demin, V. G.; Bachurina, E. P.; Lichargin, D. V.; Abkaryan, A. K.; Zeer, G. M.; Зеер Г.М.; Zharkov, S. M.; Жарков, Сергей Михайлович; International Scientific Conference Reshetnev Readings(20 ; 2016 ; Nov. 9-12 ; Krasnoyarsk)
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Resonant X-ray second-harmonic generation in atomic gases / J. -C. Liu [et al.] // Phys. Rev. A. - 2019. - Vol. 100, Is. 6. - Ст. 063403, DOI 10.1103/PhysRevA.100.063403. - Cited References: 29. - The research leading to these results has received funding from a public grant from the Laboratoire d’Excellence Physics Atoms Light Matter (LabEx PALM), the Laboratoire d’Excellence MiChEm, and the Swedish Research Council (VR). J.-C.L. acknowledges support from the National Science Foundation of China under Grants No. 11574082 and No. 11974108, and the Fundamental Research Funds for the . - ISSN 2469-9926. - ISSN 2469-9934
Аннотация: We explore the X-ray second harmonic generation process induced by resonant two-photon absorption in systems with inversion symmetry. We show that this process becomes allowed in the X-ray region due to non-dipole contributions. It is found that while a plane wave pump field generates only a longitudinal second harmonic field, a Gaussian pump beam creates also a radially polarized transverse second harmonic field which is stronger than the longitudinal one. Contrary to the longitudinal component, the transverse second harmonic field with zero intensity on the axis of the pump beam can run in free space. Our theory is applied to Ar and Ne atomic vapours and predicts an energy conversion efficiency of X-ray second harmonic generation of 3.2×10−11 and 1.3×10−12, respectively.

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Держатели документа:
Department of Mathematics and Physics, North China Electric Power University, 102206 Beijing, China
Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250358, China
Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
Extreme Light Infrastructure Nuclear Physics (ELI-NP), 'Horia Hulubei' National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125 Magurele, Judet Ilfov, Romania
LIDYL, CEA, CNRS, Universite Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France
Theoretical Chemistry & Biology, School of Biotechnology, Royal Institute of Technology, S-106 91 Stockholm, Sweden
Department of Physics and Astronomy, UppsalaUniversity, SE-75120Uppsala, Sweden
Siberian Federal University, 660041 Krasnoyarsk, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Institute for Methods and Instrumentation in Synchrotron Radiation Research FG-ISRR, Helmholtz-Zentrum Berlin fur Materialien und Energie Albert-Einstein-Strasse 15, 12489 Berlin, Germany

Доп.точки доступа:
Liu, Ji-Cai; Miron, Catalin; Ågren, Hans; Polyutov, S. P.; Полютов, Сергей Петрович; Gel'mukhanov, F.; Гельмуханов, Фарис Хафизович
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Bloch Dynamics of Interacting Cold Atoms [Text] / A. R. Kolovsky, H. J. Korsch // International Seminar and Workshop on Nonlinear Phenomena in Degenerate Quantum Gases, Ourense, Spain April : Conference Abstracts. - 2010. - P46

Доп.точки доступа:
Kolovsky, A.R.; Korsch, H.J.; International Seminar and Workshop on Nonlinear Phenomena in Degenerate Quantum Gases(2010 ; Apr. ; Ourense, Spain)
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