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利用Monte Carlo方法,我们发现在水平方向上具有m自旋相互作用而在竖直方向具有n自旋相互作用的二维Ising模型。当m=n=3时,其相变是一级相变,而当m=3,n=2时,其相变却是二级相变。The order of phase transition of a two-dimensional Ising model with m-body interactions in the horizontal direction and n-body interactions in the vertical direction in the m = 3, n = 3 case is of the first-order which is determined by our Monte Carlo algorithm, while in the m= 3,n=2 case the transition is of the second order.
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