Critical temperature and thermodynamics of the BEC-BCS crosssover
ORAL
Abstract
The strongly-correlated regime of the BCS-BEC crossover can be realized by diluting a system of two-component fermions with a contact attractive interaction and an appropriate ultraviolet regularization. We investigate this system via a novel systematic-error-free continuous-space-time diagrammatic determinant Monte Carlo method. The results allow us to predict the universal curve $T_c/E_F$ as a function of the parameter $k_F a$ with the maximum on the BEC side. At unitarity, $T_c/E_F$ = 0.152(7). We also determine the thermodynamic functions and show how the Monte Carlo results can be used for accurate thermometry.
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