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本文通过decoration变换和decimation变换把在平方晶格上的自旋-1模型等价于一个checkerboard晶格上具有次近邻和四体相互作用的伊辛模型,并得到自旋-1模型的近似临界条件。该近似临界条件在极限情况下与Onsager的严格解一致。In this paper, we apply the decoration and decimation transformation to the square-lattice spin-1 model and show that it is equivalent toa checkerboard Ising model with cross and four-spin interactions. Then, the approximate critical condition is obtained for the model and it reduces to Onsager's exact solution in the Ising-model limit.
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