Phase transition in two-dimensional classical coulomb plasma by mapping to quantum sine-Gordon system in Euclidean space

作者：Chen ZJ^*; Zhang YM; Xu BW

来源：Communications in Theoretical Physics, 1996, 25(3): 269-276.

The phase transition of the two-dimensional (2D) Coulomb plasma is studied with the help of the equivalence to a quantum sine-Gordon system in 2D Euclidean space. The minimum and the stability of the grand canonical potential are derived by making use of the variational effective potential method. The phase diagram thus obtained shows a larger region of plasma phase in the parameter plane than the parallel result in the (1+1)-dimensional Minkowski space. The origin of this difference is discussed in connection with the manner of the large momentum cut off being taken.

• 单位
  同济大学; 上海交通大学