Coupled-cluster theory of a gas of strongly-interacting fermions in the dilute limit

Abstract

We study the ground-state properties of a dilute gas of strongly-interacting fermions in the framework of the coupled-cluster expansion (CCE). We demonstrate that properties such as universality, opening of a gap in the excitation spectrum and applicability of s-wave approximations appear naturally in the CCE approach. In the zero-density limit, we show that the ground-state energy density depends on only one parameter which in turn may depend at most on the spatial dimensionality of the system.

7 figures

References in corpus (3)

• Observation of Bose-Einstein Condensation of Molecules
• Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
• Collective oscillations of a Fermi gas in the unitarity limit: Temperature effects and the role of pair correlations

Cited by in corpus (1)

• Auxiliary field formalism for dilute fermionic atom gases with tunable interactions