LAUSR

Abstract The thermodynamic properties of spin-polarized 6 Li atoms in highly elongated traps are studied within the Static Fluctuation Approximation. The chemical potential μ , energy per particle U/N , specific heat capacity C V / N , and the effective magnetic field h are determined as a function of temperature and potential strength (magnetic field B ). We used the contact potential as the two-body interaction potential. For a repulsive interaction μ and U increase parabolically with B , while for an attractive interaction both increase monotonically with B until saturation at B larger than the resonance field. The effect of the two-body interaction on C V appears at temperatures comparable with the Fermi temperature. μ and U/N of the system were studied of different channels; It is found that these quantities are channel dependent, and the behavior of h at low temperature depends on the potential strength. Our results are consistent with that obtained by the mean-field Bogoliubov–de Gennes method.