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- Russian Academy of SciencesRU151 papers
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56 papers · 1 filter
Momentum distribution of a trapped Fermi gas with large scattering length
L. Viverit, S. Giorgini, L. P. Pitaevskii +1
Using a scattering length parametrization of the BCS-BEC crossover as well as the local density approximation for the density profile, we calculate the momentum distribution of a h…
Bose-Einstein condensates in 1D optical lattices: compressibility, Bloch bands and elementary excitations
Meret Kraemer, Chiara Menotti, Lev Pitaevskii +1
We discuss the Bloch-state solutions of the stationary Gross-Pitaevskii equation and of the Bogoliubov equations for a Bose-Einstein condensate in the presence of a one-dimensional…
Transition to superfluid turbulence governed by an intrinsic parameter
A. P. Finne, T. Araki, R. Blaauwgeers +6
Hydrodynamic flow in both classical and quantum fluids can be either laminar or turbulent. To describe the latter, vortices in turbulent flow are modelled with stable vortex filame…
Structure of surface vortex sheet between two rotating 3He superfluids
R. Hänninen, R. Blaauwgeers, V. B. Eltsov +4
We study a two-phase sample of superfluid 3He where vorticity exists in one phase (3He-A) but cannot penetrate across the interfacial boundary to a second coherent phase (3He-B). W…
Landau damping of transverse quadrupole oscillations of an elongated Bose-Einstein condensate
M. Guilleumas, L. P. Pitaevskii
We study the interaction between low-lying transverse collective oscillations and thermal excitations of an elongated Bose-Einstein condensate by means of perturbation theory. We c…
Macroscopic dynamics of a trapped Bose-Einstein condensate in the presence of 1D and 2D optical lattices
M. Kraemer, L. Pitaevskii, S. Stringari
The hydrodynamic equations of superfluids for a weakly interacting Bose gas are generalized to include the effects of periodic optical potentials produced by stationary laser beams…