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Equation of State of a Fermi Gas in the BEC-BCS Crossover: A Quantum Monte Carlo Study
We calculate the equation of state of a two-component Fermi gas with attractive short-range interspecies interactions using the fixed-node diffusion Monte Carlo method. The interaction strength is varied over a wide range by tuning the value $a$ of the $s$-wave scattering length of the two-body potential. For $a>0$ and $a$ …