GENERALIZED HUGENHOLTZ–VAN HOVE THEOREM FOR MULTI-COMPONENT FERMI SYSTEMS WITH MULTI-BODY FORCES

Abstract

We show here that the Hugenholtz–Van Hove theorem for an infinite Fermi system remains valid even with all possible multi-body interaction terms taken into account either separately or in any combination under Hartree–Fock approximation. We further extend the theorem to obtain its most generalized form that would hold good for any multi-component Fermi system.