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arXiv 0803.3538cond-mat.str-elcond-mat.softhep-lat
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受抑量子反铁磁体的嵌套聚类算法

Nested Cluster Algorithm for Frustrated Quantum Antiferromagnets

M. Nyfeler, F. -J. Jiang, F. Kämpfer, U. -J. Wiese

摘要:

受抑量子反铁磁体的模拟存在严重的符号问题。我们解决了遍历性问题的循环集群算法在一个自然的方式,并适用于一个强大的战略,以解决的迹象问题。对于自旋为1/2的海森堡反铁磁体在一个kagome和沮丧的正方形晶格上,嵌套集群算法消除了大系统的符号问题。该方法适用于一般的晶格几何形状,但仅限于中等温度。

英文摘要:

Simulations of frustrated quantum antiferromagnets suffer from a severe sign problem. We solve the ergodicity problem of the loop-cluster algorithm in a natural way and apply a powerful strategy to address the sign problem. For the spin 1/2 Heisenberg antiferromagnet on a kagome and on a frustrated square lattice, a nested cluster algorithm eliminates the sign problem for large systems. The method is applicable to general lattice geometries but limited to moderate temperatures.

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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