A construction of local operators in the lattice sine-Gordon model

by Oota, Takeshi

Abstract

In the framework of the quantum inverse scattering method, we consider a problem of constructing local operators for the lattice sine-Gordon model. A certain class of local operators can be constructed from the L-operator in a simple way. They have simple commutation relations with the half of the matrix elements of the monodromy matrix. The form factors of these operators can be calculated by using the standard algebraic Bethe ansatz techniques.