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Anomalous fluctuations of the condensate in interacting Bose gases
S. Giorgini, L. P. Pitaevskii, S. Stringari
We find that the fluctuations of the condensate in a weakly interacting Bose gas confined in a box of volume follow the law . This anomalous behaviour ari…
Landau damping in dilute Bose gases
L. P. Pitaevskii, S. Stringari
Landau damping in weakly interacting Bose gases is investigated by means of perturbation theory. Our approach points out the crucial role played by Bose-Einstein condensation and y…
Collective and single particle excitations of a trapped Bose gas
F. Dalfovo, S. Giorgini, M. Guilleumas +2
The density of states of a Bose-condensed gas confined in a harmonic trap is investigated. The predictions of Bogoliubov theory are compared with the ones of Hartree-Fock theory an…
Thermodynamics of a trapped Bose-condensed gas
S. Giorgini, L. P. Pitaevskii, S. Stringari
We investigate the thermodynamic behaviour of a Bose gas interacting with repulsive forces and confined in a harmonic anisotropic trap. We develop the formalism of mean field theor…