CAJ | 학술논문

在计算有限温度SU(2)格点规范模型Polyakov线的过程中，考虑到变分累积展开法中有限距离相互作用效应与Monte Carlo中的有限体积效应的相似性，采用了新的方法来确定相变点. 与已有的方法以及Monte Carlo模拟给出的结果比较，新方法给出的结果更接近Monte Carlo结果.
재계산유한온도SU(2)격점규범모형Polyakov선적과정중，고필도변분루적전개법중유한거리상호작용효응여Monte Carlo중적유한체적효응적상사성，채용료신적방법래학정상변점. 여이유적방법이급Monte Carlo모의급출적결과비교，신방법급출적결과경접근Monte Carlo결과.
Based on Variational-cumulant expansion (VCE), through calculating Polyakov line in the SU(2) gauge model at finite temperature and considering the similarity of finite size interaction in VCE method with the finite volume effect in Monte Carlo (MC) simulation, a new approach is adopted to determine the critical couplings for the deconfinement phase transition. New results of VCE which are close to MC data manifest that new approach is much more effective than the traditional one and show that VCE analysis is consistent with MC simulation.