Expansion of an interacting Fermi gas
Anno: 2002
Autori: Menotti C., Pedri P., Stringari S.
Affiliazione autori: Univ Trent, Dipartimento Fis, I-38050 Trento, Italy; INFM, BEC, I-38050 Trento, Italy; Univ Cattolica Sacro Cuore, Dipartimento Matemat & Fis, I-25121 Brescia, Italy.
Abstract: We study the expansion of a dilute ultracold sample of fermions initially trapped in an anisotropic harmonic trap. The expansion of the cloud provides valuable information about the state of the system and the role of interactions. In particular, the time evolution of the deformation of the expanding cloud behaves quite differently depending on whether the system is in the normal or in the superfluid phase. For the superfluid phase, we predict an inversion of the deformation of the sample, similar to what happens with Bose-Einstein condensates. Vice versa, in the normal phase, the inversion of the aspect ratio is never achieved, if the mean field interaction is attractive and collisions are negligible.
Giornale/Rivista: PHYSICAL REVIEW LETTERS
Volume: 89 (25) Da Pagina: 250402-1 A: 250402-4
Parole chiavi: Bose-einstein Condensation; Time-dependent Traps; Superfluid; Evolution; ModeDOI: 10.1103/PhysRevLett.89.250402Citazioni: 169dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-06-29Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)
