采用 SYMANZIK 改进作用量的 SU(2)格点规范理论的变分累积展开研究

摘要

应用变分累积展开方法,将具有 Symanzik 改进作用量的 S U(2) 格点规范模型的内能和比热展开到第三级.变分参数由主变分方法确定,并将计算结果与蒙特卡罗和标准 Wilson 模型的结果进行了对比,证明 VCE 方法可给出与蒙特卡罗方法一致的结果.%With the variational-cumulant expansion method, the internal ene rgy and the specific heat of the SU(2) lattice gauge theory with Symanzik's improved action are calculated up to the third order. The variational parameter is determined by the main valued method and the results are compared with the M onte Carlo results as well as the results for the standard Wilson action. It is shown that the VCE method can give a consistent result with that of Monte Carlo Method.