On the Quantum—Group Restriction of the Massive Thirring (Sine—Gordon) Model

Masatoshi Imada, Kazuo Hida, M. Ishikawa

Masatoshi Imada, Kazuo Hida, M. Ishikawa

Zou Bo-Xia, Jun Yan, Tao Wang

Shuichi Iwabuchi

Giovanni Feverati

In this thesis, we review recent progresses on Nonlinear Integral Equation approach to finite size effects in two dimensional integrable quantum field theories, with emphasis to Sine-Gordon/Massive Thirring model and restrictions to minimal models perturbed by $Φ_{1,3}$. Exact calculations of the dependence of energy levels on the size are presented for vacuum and many excited states.

Jun Yan

The free energy at low temperature in 1D sine-Gordon–Thirring model with impurity coupling is studied by means of functional integrals method. For massive free sine-Gordon–Thirring model, free energy is obtained from perturbation expansion of functional determinant. Moreover, the free energy of massive model is calculated by use of an auxiliary Bose field method.