Critical Temperature Curve in the BEC-BCS Crossover

Abstract

The strongly-correlated regime of the BCS-BEC crossover can be realized by diluting a system of two-component fermions with a short-range attractive interaction. We investigate this system via a novel continuous-space-time diagrammatic determinant Monte Carlo method and determine the universal curve $T_c/{\epsilon }_F$ for the transition temperature between the normal and the superfluid states as a function of the scattering length with the maximum on the BEC side. At unitarity, we confirm that $T_c/{\epsilon }_F=0.152(7)$.

revtex, 4 pages, 3 figures, published version

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