From Low-Density Neutron Matter to the Unitary Limit

Details From Low-Density Neutron Matter to the Unitary Limit From Low-Density Neutron Matter to the Unitary Limit

2007-08-19

arxiv.org/abs/0708.2524v3

Phys.Rev.C79:054003,2009

Physics

Nuclear Physics

Nuclear Theory

18 pages, 7 figures, to appear in Physical Review C

Scientific paper

10.1103/PhysRevC.79.054003

Various quantities of an attractively interacting fermion system at the unitary limit are determined by extrapolating Monte Carlo results of low-density neutron matter. Smooth extrapolation in terms of $1/(k_F a_0)$ ($k_F$ is the Fermi momentum, and $a_0$ is the ${}^1S_0$ scattering length) is found with the quantities examined: the ground-state energy, the pairing gap at $T \approx 0$, and the critical temperature of the normal-to-superfluid phase transition. We emphasize proximity of the physics of low-density neutron matter to that at the unitary limit. The extrapolated quantities are in a reasonable agreement with those in the literature.

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