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- Joint Institute for Nuclear ResearchRU49 papers
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7 papers · 1 filter
Expansion of a quantum gas released from an optical lattice
F. Gerbier, S. Trotzky, S. Foelling +9
We analyze the interference pattern produced by ultracold atoms released from an optical lattice. Such interference patterns are commonly interpreted as the momentum distributions…
Superfluid pairing between fermions with unequal masses
M. A. Baranov, C. Lobo, G. V. Shlyapnikov
We consider a superfluid state in a two-component gas of fermionic atoms with equal densities and unequal masses in the BCS limit. We develop a perturbation theory along the lines…
Phase diagram and thermodynamics of the three-dimensional Bose-Hubbard model
B. Capogrosso-Sansone, N. V. Prokof'ev, B. V. Svistunov
We report results of quantum Monte Carlo simulations of the Bose-Hubbard model in three dimensions. Critical parameters for the superfluid-to-Mott-insulator transition are determin…
Friction and diffusion of matter-wave bright solitons
Subhasis Sinha, Alexander Yu. Cherny, Dmitry Kovrizhin +1
We consider the motion of a matter-wave bright soliton under the influence of a cloud of thermal particles. In the ideal one-dimensional system, the scattering process of the quasi…
Condon domains - these non-magnetic diamagnetic domains
Valerij S. Egorov
The paper, not pretending for a complete and detailed review, is intended mainly for a wide community of physicists, not only specialists in this particular subject. The author giv…
Observer dependence for the phonon content of the sound field living on the effective curved space-time background of a Bose-Einstein condensate
Petr O. Fedichev, Uwe R. Fischer
We demonstrate that the ambiguity of the particle content for quantum fields in a generally curved space-time can be experimentally investigated in an ultracold gas of atoms formin…