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自由费米子与二维伊辛模型

Free Fermions and Two-Dimensional Ising Model

V. N. Plechko

摘要:

二维伊辛模型可表示为格点自由费米子场论的反对易格拉斯曼变量积分。在零磁场的精确解,然后通过计算高斯费米子积分的配分函数。本文认为,通过打开非零磁场,作用量中出现了非局域和非高斯的费米子项,这意味着近似的分析方法。

英文摘要:

The two-dimensional Ising model is representable as a lattice free-fermion field theory in terms of the integral over anticommuting Grassmann variables. The exact solution in a zero magnetic field then follows by evaluating Gaussian fermionic integral for partition function. It is argued that by switching on of a non-zero magnetic field the non-local and non-Gaussian fermionic terms appear in the action, which rather imply approximating methods of the analysis.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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