- 04-49 Fumio Hiroshima
- Multiplicity of ground states in quantum field models:
applications of asymptotic fields
Feb 27, 04
(auto. generated ps),
of related papers
Abstract. The ground states of an abstract model in quantum field
theory are investigated.
By means of the asymptotic field theory, we give
a necessary and sufficient condition for that the expectation value of the
number operator of ground states is finite,
from which we obtain
a wide-usable method to estimate
an upper bound of the multiplicity of ground states.
Ground states of massless GSB models and the Pauli-Fierz model with spin 1/2
are investigated as examples.