Equation of state and collective frequencies of a trapped Fermi gas along the BEC-unitarity crossover
Anno: 2005
Autori: Astrakharchik G.E., Combescot R., Leyronas X., Stringari S.
Affiliazione autori: Univ Trent, Dipartimento Fis, I-38050 Trento, Italy, INFM, BEC, I-38050 Trento, Italy, Ecole Normale Super, Coll France, F-75231 Paris, France, Ecole Normale Super, Lab Kastler Brossel, F-75231 Paris, France, Ecole Normale Super, Lab Phys Stat, F-75231 Paris, France
Abstract: We show that the study of the collective oscillations in a harmonic trap provides a very sensitive test of the equation of state of a Fermi gas near a Feshbach resonance. Using a scaling approach, whose high accuracy is proven by comparison with exact hydrodynamic solutions, the frequencies of the lowest compressional modes are calculated at T=0 in terms of a dimensionless parameter characterizing the equation of state. The predictions for the collective frequencies, obtained from the equations of state of mean-field BCS theory and of recent Monte Carlo calculations, are discussed in detail.
Giornale/Rivista: PHYSICAL REVIEW LETTERS
Volume: 95 (3) Da Pagina: 030404-1 A: 030404-4
Maggiori informazioni: doi: 10.1103/PhysRevLett.95.030404Parole chiavi: Ultracold atoms; equation of state; excitations; fermi gas; DOI: 10.1103/PhysRevLett.95.030404Citazioni: 78dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-28Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui