Tuesday, October 16, 2012

1210.4131 (C. N. Gilbreth et al.)

Pair condensation in a Finite Trapped Fermi Gas    [PDF]

C. N. Gilbreth, Y. Alhassid
We study signatures of the superfluid phase transition and the pseudogap phase in a trapped finite-size system of spin-1/2 fermions with infinite scattering length. Applying the auxiliary-field quantum Monte Carlo (AFMC) method in the canonical ensemble, we compute the energy-staggering pairing gap, heat capacity, and condensate fraction as a function of temperature. Our calculations reveal clear signatures of the superfluid phase transition in all three quantities, including a signature of the lambda peak in the heat capacity. Comparing the temperature dependence of these quantities shows that the pairing gap does not exhibit an obvious pseudogap effect in this system.
View original: http://arxiv.org/abs/1210.4131

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