Lattice gas models derived from effective field theory

Details Lattice gas models derived from effective field theory Lattice gas models derived from effective field theory

2004-12-03

arxiv.org/abs/nucl-th/0412014v1

Phys.Rev.C71:044005,2005

Physics

Nuclear Physics

Nuclear Theory

13 pages, 4 figures

Scientific paper

10.1103/PhysRevC.71.044005

We start from a low-energy effective field theory for interacting fermions on the lattice and expand in the hopping parameter to derive the nearest-neighbor interactions for a lattice gas model. In this model the renormalization of couplings for different lattice spacings is inherited from the effective field theory, systematic errors can be estimated a priori, and the breakdown of the lattice gas model description at low temperatures can be understood quantitatively. We apply the lattice gas method to neutron matter and compare with results from a recent quantum simulation.

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