Condensate fraction of a Fermi gas in the BCS-BEC crossover
Anno: 2005
Autori: Salasnich L., N. Manini, A. Parola
Affiliazione autori: Univ Milan, Dipartimento Fis, Via Celoria 16, I-20133 Milan, Italy; Univ Milan, INFM, I-20133 Milan, Italy; Univ Insubria, Dipartimento Matemat & Fis, I-22100 Como, Italy; Univ Insubria, INFM, I-22100 Como, Italy
Abstract: We investigate the Bose-Einstein condensation of fermionic pairs in a uniform two-component Fermi gas, obtaining an explicit formula for the condensate density as a function of the chemical potential and the energy gap. We analyze the condensate fraction in the crossover from the Bardeen-Cooper-Schrieffer (BCS) state of weakly interacting Cooper pairs to the Bose-Einstein condensate of molecular dimers. By using the local-density approximation we study confined Fermi vapors of alkali-metal atoms for which there is experimental evidence of condensation also on the BCS side of the Feshbach resonance. Our theoretical results are in agreement with these experimental data and give the behavior of the condensate on both sides of the Feshbach resonance at zero temperature.
Giornale/Rivista: PHYSICAL REVIEW A
Volume: 72 Da Pagina: 023621 A: 023621
Parole chiavi: ultracold atomsDOI: 10.1103/PhysRevA.72.023621Citazioni: 82dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-12Riferimenti 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