The ground‐state properties of a two‐component Fermi gas with attractive short‐range interactions are calculated using the fixed‐node diffusion Monte Carlo method. The interaction strength is varied over a wide range by tuning the value of the s‐wave scattering length of the two‐body potential. We calculate the ground‐state energy per particle and we characterize the equation of state of the system. Off‐diagonal long‐range order is investigated through the asymptotic behavior of the two‐body density matrix. The condensate fraction of pairs is calculated in the unitary limit and on both sides of the BCS‐BEC crossover.

This content is only available via PDF.
You do not currently have access to this content.