A lattice theory for low energy fermions at finite chemical potential

Details A lattice theory for low energy fermions at finite chemical potential A lattice theory for low energy fermions at finite chemical potential

2003-08-14

arxiv.org/abs/hep-lat/0308016v2

Phys.Rev.Lett. 92 (2004) 257002

Physics

High Energy Physics

High Energy Physics - Lattice

Revised introduction, several typos fixed. Conforms to version accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.92.257002

We construct a lattice theory describing a system of interacting nonrelativistic spin s=1/2 fermions at nonzero chemical potential. The theory is applicable whenever the interparticle separation is large compared to the range of the two-body potential, and does not suffer from a sign problem. In particular, the theory could be useful in studying the thermodynamic limit of fermion systems for which the scattering length is much larger than the interparticle spacing, with applications to realistic atomic systems and dilute neutron gases.

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