Phase structure of the 1+1 dimensional massive Thirring model from matrix product states

Understand

Employing matrix product states as an ansatz, we study the non-thermal phase structure of the (1+1)-dimensional massive Thirring model in the sector of vanishing total fermion number with staggered regularization.

• In this paper, details of the implementation for this project are described.
• To depict the phase diagram of the model, we examine the entanglement entropy, the fermion bilinear condensate and two types of correlation functions.
• Our investigation shows the existence of two phases, with one of them being critical and the other gapped.