2008

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

Bulgac, Aurel, Drut, Joaquin E., Magierski, Piotr

Understand

The Quantum Monte Carlo method for spin 1/2 fermions at finite temperature is formulated for dilute systems with an s-wave interaction.

The motivation and the formalism are discussed along with descriptions of the algorithm and various numerical issues.
We report on results for the energy, entropy and chemical potential as a function of temperature.
We give upper bounds on the critical temperature T_c for the onset of superfluidity, obtained by studying the finite size scaling of the condensate fraction.

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