Symmetry Breaking in Finite Volume (II)**The project supported by National Natural Science Foundation of China (NNSFC) under Grant No. 19705001, Climbing-Up Program of China, the startup fund from Educational Ministry of China and the Natural Science Fund from Peking University

Abstract

Using a Hamiltonian approach and the adiabatic approximation, the low-lying spectrum of the lattice model in the broken phase is analyzed to the next to leading order. It is seen that these corrections appear as a systematic expansion in the inverse power of the lattice size L in the large volume limit.