Quantum Monte Carlo Simulation of the BCS-BEC Crossover at Finite Temperature

Adam Richie-Halford, University of Washington

We discuss improvements to a quantum Monte Carlo method for spin-1/2 fermions at finite temperature for dilute systems with an s-wave interaction. This method describes cold fermionic gases near the unitary regime, where the system is dilute and the interaction range is large. We discuss the method formalism as well as algorithmic and numerical considerations. We calculate the energy, entropy and chemical potential as a function of temperature and give upper bounds on the critical temperature Tc for the onset of superfluidity, obtained by studying the finite-size scaling of the condensate fraction.

Abstract Author(s): Adam C. Richie-Halford, Aurel Bulgac, Kenneth J. Roche