Abstract
The unitarity regime of the BCS-BEC crossover can be realized by diluting a system of two-component lattice fermions with an on-site attractive interaction. We perform a systematic-error-free finite-temperature simulation of this system by diagrammatic determinant Monte Carlo method. The critical temperature in units of Fermi energy is found to be . We also report the behavior of the thermodynamic functions, and discuss the issues of thermometry of ultracold Fermi gases.
- Received 8 February 2006
DOI:https://doi.org/10.1103/PhysRevLett.96.160402
©2006 American Physical Society