PROOF OF THE VARIATIONAL PRINCIPLE FOR A PAIR HAMILTONIAN BOSON MODEL

JOSEPH V. PULÉ, VALENTIN A. ZAGREBNOV
2007 Reviews in Mathematical Physics  
We give a two parameter variational formula for the grand-canonical pressure of the Pair Boson Hamiltonian model. By using the Approximating Hamiltonian Method we provide a rigorous proof of this variational principle.
doi:10.1142/s0129055x07002924 fatcat:l5doqar7sbawbfro4wzash3lom