This is a model for spin-1/2 fermions with an ultralocal contact interaction. The (first-quantized) Hamiltonian is precisely the same as the one of Lieb-Liniger. It was solved in 1967.Gaudin.PLA.24 and further in 1967.Yang.PRL.19.
Author: Jean-Sébastien Caux
Created: 2024-01-18 Thu 14:24