Simulations of Dilute Fermi Gases

Abstract

Dilute atomic Fermi gases are the subject of much current theoretical and experimental interest. Atomic gases have been cooled to temperatures much lower than the Fermi energy, and initial measurements of their properties have been achieved. We describe Quantum Monte Carlo calculations of the ground‐state properties of these intriguing systems, from the weak‐coupling regime described by BCS theory to the strong‐coupling regime where the atoms pair into weakly‐interacting dimers. We describe ground‐state properties and also calculations of the lowest spin‐excitations in these systems. Important directions for future work are also highlighted.