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Nucleation in finite topological systems during continuous metastable quantum phase transitions / O. Fialko [et al.] // Phys. Rev. Lett. - 2012. - Vol. 108, Is. 25. - Ст. 250402, DOI 10.1103/PhysRevLett.108.250402. - Cited References: 31. - We acknowledge stimulating discussions with Jean-Sebastien Caux and Lincoln Carr. A. K. thanks Massey University for hospitality. O. F., M. C. D., and J. B. were supported by the Marsden Fund (Contract No. MAU0910) administrated by the Royal Society of New Zealand. . - ISSN 0031-9007

РУБ Physics, Multidisciplinary
Рубрики:
SYMMETRY-BREAKING
   VORTEX NUCLEATION
   BROKEN SYMMETRY
   THERMALIZATION
   SUPERFLUID
   DYNAMICS
   STATE
Аннотация: Finite topological quantum systems can undergo continuous metastable quantum phase transitions to change their topological nature. Here we show how to nucleate the transition between ring currents and dark soliton states in a toroidally trapped Bose-Einstein condensate. An adiabatic passage to wind and unwind its phase is achieved by explicit global breaking of the rotational symmetry. This could be realized with current experimental technology.

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Держатели документа:
[Fialko, Oleksandr
Delattre, Marie-Coralie
Brand, Joachim] Massey Univ, Ctr Theoret Chem & Phys, Auckland 0745, New Zealand
[Fialko, Oleksandr
Delattre, Marie-Coralie
Brand, Joachim] Massey Univ, New Zealand Inst Adv Study, Auckland 0745, New Zealand
[Kolovsky, Andrey R.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Kolovsky, Andrey R.] Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Fialko, O.; Delattre, M.C.; Brand, J.; Kolovsky, A. R.; Коловский, Андрей Радиевич
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Kolovsky, A. R.
Driven Harper model / A. R. Kolovsky, G. . Mantica // Phys. Rev. B. - 2012. - Vol. 86, Is. 5. - Ст. 54306, DOI 10.1103/PhysRevB.86.054306. - Cited References: 14. - Computations for this work have been performed on the CSN4 cluster of INFN in Pisa. G. M. acknowledges the support of MIUR-PRIN project "Nonlinearity and disorder in classical and quantum transport processes" and A. K. acknowledges the support of SB RAS project "Dynamics of atomic Bose-Einstein condensates in optical lattices" and RFBR project "Tunneling of the macroscopic quantum states." . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
MAGNETIC-FIELDS
ELECTRONS
DYNAMICS
Аннотация: We analyze the driven Harper model, which appears in the problem of tight-binding electrons in the Hall configuration (normal to the lattice plane magnetic field plus in-plane electric field). The presence of an electric field extends the celebrated Harper model, which is parametrized by the Peierls phase, into the driven Harper model, which is additionally parametrized by two Bloch frequencies, associated with the two components of the electric field. We show that the eigenstates of the driven Harper model are either extended or localized, depending on the commensurability of the Bloch frequencies. This results holds for both rational and irrational values of the Peierls phase. In the case of incommensurate Bloch frequencies we provide an estimate for the wave-function localization length.

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Держатели документа:
[Kolovsky, Andrey R.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Kolovsky, Andrey R.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Mantica, Giorgio] Univ Insubria, Ctr Nonlinear & Complex Syst, I-22100 Como, Italy
[Mantica, Giorgio] CNISM Unita Como, I-22100 Como, Italy
[Mantica, Giorgio] INFN Sez Milano, Milan, Italy

Доп.точки доступа:
Mantica, G.; Коловский, Андрей Радиевич
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Krasnov, P. O.
Interaction of Scandium and Titanium Atoms with a Carbon Surface Containing Five- and Seven-Membered Rings / P. O. Krasnov, N. S. Eliseeva, A. A. Kuzubov // J. Exp. Theor. Phys. - 2012. - Vol. 114, Is. 1. - P. 80-84, DOI 10.1134/S1063776111160059. - Cited References: 25. - We are grateful to the Joint Supercomputer Center, Russian Academy of Sciences, for the possibility of using the computer cluster for our quantum-chemical calculations. This work was supported by the Ministry of Education and Science of the Russian Federation (federal program "Human Capital for Science and Education in Innovative Russia" for 2009-2013). . - ISSN 1063-7761. - ISSN 1090-6509

РУБ Physics, Multidisciplinary
Рубрики:
MOLECULAR-HYDROGEN COMPLEXES
   STORAGE
   NANOTUBES
   TRANSITION
   ENERGY
   TEMPERATURE
   EXCHANGE
   DYNAMICS
   METALS
   C60
Аннотация: The use of carbon nanotubes coated by atoms of transition metals to store molecular hydrogen is associated with the problem of the aggregation of these atoms, which leads to the formation of metal clusters. The quantum-chemical simulation of cluster models of the carbon surface of a graphene type with scandium and titanium atoms has been performed. It has been shown that the presence of five- and seven-membered rings, in addition to six-membered rings, in these structures makes it possible to strongly suppress the processes of the migration of metal atoms over the surface, preventing their clustering.

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Публикация на русском языке Краснов, Павел Олегович. Взаимодействие атомов скандия и титана с углеродной поверхностью, содержащей пятичленные и семичленные кольца [Текст] / П. О. Краснов, Н. С. Елисеева, А. А. Кузубов // Журн. эксперим. и теор. физ. : Наука, 2012. - Т. 141 Вып. 1. - С. 90-95

Держатели документа:
[Krasnov, P. O.
Kuzubov, A. A.] Siberian State Technol Univ, Krasnoyarsk 660049, Russia
[Krasnov, P. O.
Kuzubov, A. A.] Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
[Eliseeva, N. S.
Kuzubov, A. A.] Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Eliseeva, N. S.; Kuzubov, A. A.; Кузубов, Александр Александрович; Краснов, Павел Олегович; Ministry of Education and Science of the Russian Federation
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Measurement of Raman-scattering spectra of Rb2KMoO3F3 crystal: Evidence for controllable disorder in the lattice structure / A. S. Krylov [et al.] // Cryst. Growth Des. - 2014. - Vol. 14, Is. 3. - P. 923-927, DOI 10.1021/cg4008894. - Cited References: 31. - The authors are grateful to Prof. I. N. Flerov for valuable support and useful discussions. The authors acknowledge stimulating discussions with Dr. S. N. Sofronova and Dr. A. S. Aleksandrovsky. The assistance of Dr. S. Skokov is sincerely appreciated. This work was partly supported by Russian Foundation for Basic Research project nos. 11-02-98002-r and 12-02-00056 and integration project SB RAS no. 28, SS-4828.2012.2 grant, and Federal Special Program "Scientific and scientific-pedagogical staff of innovative Russia" (no. 8379). . - ISSN 1528-7483. - ISSN 1528-7505

РУБ Chemistry, Multidisciplinary + Crystallography + Materials Science, Multidisciplinary
Рубрики:
PHASE-TRANSITIONS
   OXYFLUORIDE
   ELPASOLITE
   (NH4)3MOO3F3
   (NH4)3WO3F3
   TEMPERATURE
   DYNAMICS
   N-2
   Cs
Аннотация: The λ-shaped line width broadening anomalies of octahedron group vibrations in Rb2KMoO3F3 disordered crystal have been revealed in the wide temperature range by Raman technique. The line width of Mo-O and Mo-F vibrations in this crystal is connected with the lattice disorder. The dependence of ordering degree passing the phase transition point history has been discovered. Wide temperature-line width area is found below structural phase transition where different lattice disorder can be obtained at a given temperature by varying the rate of sample cooling. The current study demonstrates the ability of a dynamic temperature regime to control ordering processes in crystals. © 2014 American Chemical Society.

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Держатели документа:
SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia
SB RAS, VS Sobolev Inst Geol & Mineral, Novosibirsk 630090, Russia

Доп.точки доступа:
Krylov, A. S.; Крылов, Александр Сергеевич; Kolesnikova, E. M.; Колесникова, Евгения Михайловна; Isaenko, L. I.; Krylova, S. N.; Крылова, Светлана Николаевна; Vtyurin, A. N.; Втюрин, Александр Николаевич; Russian Foundation for Basic Research [11-02-98002-r, 12-02-00056]; integration project SB RAS [28, SS-4828.2012.2]; Federal Special Program "Scientific and scientific-pedagogical staff of innovative Russia" [8379]
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Optodynamic phenomena in aggregates of polydisperse plasmonic nanoparticles / A. E. Ershov [et al.] // Appl. Phys. B. - 2014. - Vol. 115, Is. 4. - P. 547-560, DOI 10.1007/s00340-013-5636-6. - Cited References: 48. - Authors are thankful to Prof. V. A. Markel (University of Pennsylvania) for supplying program codes for realization of the coupled dipole method for polydisperse metal nanoparticle aggregates. This research was supported by the Russian Academy of Sciences under the Grants 24.29, 24.31, III.9.5, 43, SB RAS-SFU (101); Ministry of Education and Science of Russian Federation under Contract 14.B37.21.0457. . - ISSN 0946-2171. - ISSN 1432-0649

РУБ Optics + Physics, Applied
Рубрики:
SMALL-PARTICLE COMPOSITES
   OPTICAL-PROPERTIES
   NOBLE-METALS
   SILVER
   ELECTRON
   LIQUID
   GENERATION
   DYNAMICS
   FORCES
   GOLD
Аннотация: We propose an optodynamical model of interaction of pulsed laser radiation with aggregates of spherical metallic nanoparticles embedded into host media. The model takes into account polydispersity of particles, pair interactions between the particles, dissipation of absorbed energy, heating and melting of the metallic core of particles and of their polymer adsorption layers, and heat exchange between electron and ion components of the particle material as well as heat exchange with the interparticle medium. Temperature dependence of the electron relaxation constant of the particle material and the effect of this dependence on interaction of nanoparticles with laser radiation are first taken into consideration. We study in detail light-induced processes in the simplest resonant domains of multiparticle aggregates consisting of two particles of an arbitrary size in aqueous medium. Optical interparticle forces are realized due to the light-induced dipole interaction. The dipole moment of each particle is calculated by the coupled dipole method (with correction for the effect of higher multipoles). We determined the role of various interrelated factors leading to photomodification of resonant domains and found an essential difference in the photomodification mechanisms between polydisperse and monodisperse nanostructures.

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Держатели документа:
Russian Acad Sci, LV Kirenski Inst Phys, Krasnoyarsk 660036, Russia
Russian Acad Sci, Inst Computat Modeling, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660028, Russia

Доп.точки доступа:
Ershov, A. E.; Ершов, Александр Евгеньевич; Gavrilyuk, A. P.; Karpov, S. V.; Карпов, Сергей Васильевич; Semina, P. N.; Семина, Полина Николаевна; Russian Academy of Sciences [24.29, 24.31, III.9.5, 43, SB RAS-SFU (101)]; Ministry of Education and Science of Russian Federation [14.B37.21.0457]
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On the low-frequency resonance of magnetic vortices in micro- and nanodots / P. D. Kim [et al.] // Phys. Solid State. - 2015. - Vol. 57, Is. 1. - P. 30-37, DOI 10.1134/S1063783415010151. - Cited References:57. - This study was supported by the Siberian Branch of the Russian Academyof Sciences within the framework of the Interdisciplinary IntegrationProject No. 26 "Ferromagnetic Film Nanodots: Physics of Phenomena andApplications" (2012-2014). . - ISSN 1063. - ISSN 1090-6460. -

РУБ Physics, Condensed Matter
Рубрики:
EASY-PLANE FERROMAGNETS
   VORTEX CORE
   MAGNON MODES
   DYNAMICS
   FIELD
Аннотация: The resonance motion of the magnetization of thin cylindrical and parallelepiped micro- and nanodots has been studied theoretically and experimentally. Analytical expressions for the external-field dependence of the resonance frequency of the vortex-structure oscillations have been derived taking into account the inertial and damping coefficients. The external-field dependence of the damping parameter has been found theoretically. The influence of the effective mass of a magnetic vortex on its low-frequency dynamics has been discussed.

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Публикация на русском языке О низкочастотном резонансе магнитных вихрей в микро- и нанопятнах [Текст] / П. Д. Ким [и др.] // Физ. тверд. тела : Физико-технический институт им. А. Ф. Иоффе РАН, 2015. - Т. 57 Вып. 1. - С. 29-36

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Krasnoyarsk State Pedag Univ, Krasnoyarsk 660049, Russia.
Krasnoyarsk State Med Univ, Krasnoyarsk 660022, Russia.
Russian Acad Sci, Siberian Branch, Rzhanov Inst Semicond Phys, Novosibirsk 630090, Russia.

Доп.точки доступа:
Kim, P. D.; Ким, Пётр Дементьевич; Orlov, V. A.; Prokopenko, V. S.; Zamai, S. S.; Замай, С. С.; Prints, V. Ya; Rudenko, R. Y.; Руденко, Роман Юрьевич; Rudenko, T. V.; Руденко, Т. В.; Siberian Branch of the Russian Academy of Sciences [26]
}
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    Large isotropic negative thermal expansion above a structural quantum phase transition / S. U. Handunkanda [et al.] // Phys. Rev. B. - 2015. - Vol. 92, Is. 13. - Ст. 134101, DOI 10.1103/PhysRevB.92.134101. - Cited References:35. - The authors also acknowledge the valuable conversations with Joe Budnick and Gabe Aeppli. Work at the University of Connecticut is supported by National Science Foundation Award No. DMR-1506825. Work at the University of Costa Rica is supported by Vicerrectoria de Investigacion under Project No. 816-B5-220, and work at Argonne National Laboratory is supported by the US Department of Energy, Office of Basic Energy Sciences under Contract No. DE-AC02-06CH11357. R.T.B. acknowledges support from the Yale Prize Postdoctoral Fellowship. The construction of HERIX was partially supported by the NSF under Grant No. DMR-0115852. . - ISSN 1098. - ISSN 1550-235X
Рубрики:
SCF3 CRYSTAL
   CUBIC SCF3
   DYNAMICS
   SCATTERING
   SRTIO3
Аннотация: Perovskite structured materials contain myriad tunable ordered phases of electronic and magnetic origin with proven technological importance and strong promise for a variety of energy solutions. An always-contributing influence beneath these cooperative and competing interactions is the lattice, whose physics may be obscured in complex perovskites by the many coupled degrees of freedom, which makes these systems interesting. Here, we report signatures of an approach to a quantum phase transition very near the ground state of the nonmagnetic, ionic insulating, simple cubic perovskite material ScF3, and show that its physical properties are strongly effected as much as 100 K above the putative transition. Spatial and temporal correlations in the high-symmetry cubic phase determined using energy- and momentum-resolved inelastic x-ray scattering as well as x-ray diffraction reveal that soft mode, central peak, and thermal expansion phenomena are all strongly influenced by the transition.

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Держатели документа:
Univ Connecticut, Dept Phys, Storrs, CT 06269 USA.
Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA.
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia.
Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
Univ Costa Rica, Ctr Invest Ciencia & Ingn Mat, San Jose 2060, Costa Rica.
Univ Costa Rica, Escuela Fis, San Jose 2060, Costa Rica.
Argonne Natl Lab, Div Mat Sci, Argonne, IL 60349 USA.
Yale Univ, Dept Phys, New Haven, CT 06520 USA.
Univ Chicago, James Franck Inst, Chicago, IL 60637 USA.
Argonne Natl Lab, Argonne, IL 60349 USA.

Доп.точки доступа:
Handunkanda, S. U.; Curry, E. B.; Voronov, V. N.; Воронов, Владимир Николаевич; Said, Ayman H.; Guzman-Verri, G. G.; Brierley, R. T.; Littlewood, P. B.; Hancock, J. N.
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    Kolovsky, A. R.
    Bose-Hubbard Hamiltonian: Quantum chaos approach / A. R. Kolovsky // Int. J. Mod. Phys. B. - 2016. - Vol. 30, Is. 10. - Ст. 1630009, DOI 10.1142/S0217979216300097. - Cited References:42 . - ISSN 0217-9792. - ISSN 1793-6578
   Перевод заглавия: Гамильтониан Бозе-Хаббарда: подход с точки зрения квантового хаоса

РУБ Physics, Applied + Physics, Condensed Matter + Physics, Mathematical
Рубрики:
Optical lattice
   Dynamics
   Atoms
   States
   Model
Кл.слова (ненормированные):
Cold atoms in optical lattices -- quantum transport -- nonlinear dynamics and chaos
Аннотация: We discuss applications of the theory of quantum chaos to one of the paradigm models of many-body quantum physics - the Bose-Hubbard (BH) model, which describes, in particular, interacting ultracold Bose atoms in an optical lattice. After preliminary, pure quantum analysis of the system we introduce the classical counterpart of the BH model and the governing semiclassical equations of motion. We analyze these equations for the problem of Bloch oscillations (BOs) of cold atoms where a number of experimental results are available. The paper is written for nonexperts and can be viewed as an introduction to the field.

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Доп.точки доступа:
Коловский, Андрей Радиевич
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Laser-induced wavelength-controlled self-assembly of colloidal quasi-resonant quantum dots / A. S. Tsipotan [et al.] // Opt. Express. - 2016. - Vol. 24, Is. 10. - P. 11145-11150, DOI 10.1364/OE.24.011145. - Cited References:18. - This research is partially supported by Grant of the Ministry of Education and Science of the Russian Federation for Siberian Federal University (projects No 3.1749.2014/K, 214/71) and RFBR, research project No. 14-02-00219 A. . - ISSN 1094-4087

РУБ Optics
Рубрики:
Organized aggregation
   Metal nanoparticles
   Optical binding
   Dynamics
   Field
Аннотация: Self-assembly of colloidal semiconductor quantum dots controlled solely by laser-induced interaction is demonstrated for the first time. Pairs of CdTe nanoparticles are formed under irradiation with nanosecond pulses at wavelengths 555 or 560 nm. Formation of pairs is justified by corresponding changes of absorption spectra. Conditions of the experiment are in excellent agreement with those predicted by the theory of laser-induced dipole-dipole interaction of QDs. The fraction of QDs assembled into pairs is up to 47%. (C) 2016 Optical Society of America

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Держатели документа:
Siberian Fed Univ, Svobodny Pr 79, Krasnoyarsk 660041, Russia.
LV Kirenskii Inst Phys, Akad Gorodok 50-38, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Tsipotan, A. S.; Gerasimova, M. A.; Slabko, V. V.; Слабко, Виталий Васильевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Grant of Ministry of Education and Science of the Russian Federation [3.1749.2014/K, 214/71]; RFBR [14-02-00219 A]
}
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10.

Bulgakov, E. N.
Symmetry breaking in a T-shaped photonic waveguide coupled with two identical nonlinear cavities / E. . Bulgakov, A. . Sadreev // Phys. Rev. B. - 2011. - Vol. 84, Is. 15. - Ст. 155304, DOI 10.1103/PhysRevB.84.155304. - Cited References: 40. - A.S is grateful to Boris Malomed for fruitful discussions about symmetry breaking. The work is partially supported by RFBR grant 12-02-00483. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
MODE THEORY
   NUCLEAR REACTIONS
   UNIFIED THEORY
   SYSTEM
   FIBER
   RESONANCE
   DYNAMICS
   STATES
Аннотация: We consider light transmission in a T-shaped photonic waveguide coupled with two identical symmetrically positioned nonlinear microcavities. We present two types of symmetry breaking. The first one is a result of mixing of the symmetric input wave with antisymmetric bound states in the Fabry-Perot interferometer architecture. Similarly, the second mechanism of the symmetry breaking is the result of mixing the symmetrical input wave with the antibonding bound state in a straight waveguide coupled with two cavities positioned perpendicular to the waveguide. In both cases the mixing is due to nonlinearity. In turn, the symmetry-breaking solutions give rise to nonsymmetrical outputs in the T-shape waveguide. These effects are directly demonstrated by the electromagnetic field solutions which are complimented by coupled mode theory for the light transmission.

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Держатели документа:
[Bulgakov, Evgeny
Sadreev, Almas] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, Evgeny] Siberian State Aerosp Univ, Krasnoyarsk, Russia
ИФ СО РАН
Kirensky Institute of Physics, 660036, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk Rabochii, 31, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
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