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arXiv 0704.2277hep-latcond-mat.str-elhep-ph
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格点Gross-Neveu模型的费米子环模拟

Fermion loop simulation of the lattice Gross-Neveu model

Christof Gattringer, Verena Hermann, Markus Limmer

摘要:

我们提出了一个数值模拟的格点上的Gross-Neveu模型使用一个新的表示的费米子环。在循环表示中,由于泡利统计的所有符号被完全消除,并且配分函数是仅具有正权重的闭环上的和。我们表明,新的配方允许模拟的体积是两个数量级大于那些访问与标准方法。

英文摘要:

We present a numerical simulation of the Gross-Neveu model on the lattice using a new representation in terms of fermion loops. In the loop representation all signs due to Pauli statistics are eliminated completely and the partition function is a sum over closed loops with only positive weights. We demonstrate that the new formulation allows to simulate volumes which are two orders of magnitude larger than those accessible with standard methods.

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