Analytic Study of XY-Ising Model |
| |
| Authors: | CHEN HuaSheng ZHU YunLun |
| |
| Institution: | Department of Physics, Peking University, Beijing 100871, China |
| |
| Abstract: | We apply the variational cumulant expansion to study the phase transition of a two-dimensional coupled XY-king model. This model can describe several different systems with underlying continuous and & symmetries. We calculate the free energy, internal energy and specific heat to the third-order approximation with the trial action of two variational parameters. A comparison with Monte Carlo data is also presented. |
| |
| Keywords: | phase structure statistical model variational cumulant expansion |
|
| 点击此处可从《理论物理通讯》浏览原始摘要信息 |
| 点击此处可从《理论物理通讯》下载免费的PDF全文 |
|
