Chiral symmetry restoration at non-zero baryon density at strong coupling

I investigate chiral symmetry breaking in lattice QCD at non-zero temperature and at non-zero baryon density. In the hamiltonian formalism with Susskind fermions at strong coupling the partition function describes an antiferromagnetic Ising model in a constant magnetic field. Chiral symmetry is found to be restored at a small chemical potential μ_c ~ 1/g² and at low temperature T_c ~ 1/g². At zero temperature the finite density transition is first order, at zero chemical potential the finite temperature transition is second order.