Dean Lee
Published 2005-11-14, updated 2006-01-06Version 2
We present lattice results for the ground state energy of a spin-1/2 fermion system in the unitary limit, where the effective range of the interaction is zero and the scattering length is infinite. We compute the ground state energy for a system of 6, 10, 14, 18, and 22 particles, with equal numbers of up and down spins in a periodic cube. We estimate that in the limit of large number of particles, the ground state energy is 0.25(3) times the ground state energy of the free Fermi system.
Comments: 17 pages, 9 figures, expanded manuscript includes more data and cross-checks
Journal: Phys.Rev. B73 (2006) 115112
Ground state energy and mass gap of a generalised quantum spin ladder
Ground state energy of a non-integer number of particles with delta attractive interactions
Ground state energy of the $δ$-Bose gas at weak coupling from double extrapolation
