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

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

2009-03-16

arxiv.org/abs/0903.2786v1

Phil. Mag. 89, 1975 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

7 figures

Scientific paper

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.

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