208 citations · 523 across the 3 of their papers we have counts for
6 papers · 1 filter
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…
Finite size effects on the collective oscillations of a trapped Bose gas
Francesca Zambelli, Sandro Stringari
Sum rules are used to calculate the corrections to the hydrodynamic collective frequencies of a harmonically trapped Bose gas at T=0, due to finite size effects. We show that, with…
Vortex nucleation and quadrupole deformation of a rotating Bose-Einstein condensate
M. Kraemer, L. Pitaevskii, S. Stringari +1
Using a semi-analytic model based on the Thomas-Fermi approximation, we investigate the relevance of the quadrupole deformation of a trapped Bose-Einstein condensate for the nuclea…
Time dependent density functional theory in quantum liquids
Sandro Stringari
The formalism of density functional theory (DFT) can be easily extended to the time dependent case (TDDFT). However, while in the static case the theory is well established and is…
Density Functional in Liquid Helium: Recent Applications to Droplets and Surfaces
Franco Dalfovo, Andrea Lastri, Sandro Stringari
We present a new density functional, which is the result of a natural evolution and improvement of previous density functional theories for liquid helium. We focus on the key ingre…
Sum Rules and Bose-Einstein Condensation
S. Stringari
Various sum rules accounting for the coupling between density and particle excitations and emphasizing in an explicit way the role of the Bose-Einstein condensation are discussed.…