Hartree–Fock and random phase approximation theories in a many-fermion solvable model
Giampaolo Co', Stefano De Leo
We present an ideal system of interacting fermions where the solutions of the many-body Schrödinger equation can be obtained without making approximations. These exact solutions are used to test the validity of two many-body effective approaches, the Hartree–Fock and the random phase approximation theories. The description of the ground state done by the effective theories improves with increasing number of particles.
arXiv:1601.02418•Modern Physics Letters A•Oct 13, 2015•7 citations