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摘要: 对SU(2)格点规范理论用三种不同于常用形式的作用量进行了Monte Carlo模拟,计算了平均内能和比热。内能曲线都趋向共同的弱耦合极限,都有比热峰标志着临界点。观察到仅由于格点间隔α的高次幂项不同而引起临界点明显漂移的现象。
Abstract: For SU(2) lattice gauge theory, three alternative forms of action proposed by us are studied by means of Monte Carlo method, their internal energy per plaquette and specific heat are calculated. The curves of their internal energy approach to the same weak-coupling approximation when β is large. There are peaks on their specific heat curves which indicate the critical points of transition from strong-coupling to weak-coupling. We find clear evidence showing that the deviation of critical point is only due to the difference of higher order terms of lattice spacing a.