Data di Pubblicazione:
2005
Citazione:
Condensate fraction of a Fermi gas in the BCS-BEC crossover / L. Salasnich, N. Manini, A. Parola. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 72:2(2005), pp. 023621.23621-1-023621.23621-4.
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.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
BOSE-CONDENSATION; SUPERCONDUCTIVITY
Elenco autori:
L. Salasnich, N. Manini, A. Parola
Link alla scheda completa: