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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2007.11630hep-lat
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用iPEPS模拟2+1d $\mathbb{Z}_3$格点规范理论

Simulating 2+1d $\mathbb{Z}_3$ lattice gauge theory with iPEPS

Daniel Robaina, Mari Carmen Bañuls, J. Ignacio Cirac

摘要:

利用无限投射纠缠对态(iPEPS)对基态进行模拟,得到了2+1维零温纯$\mathbb{Z}_3$格点规范理论.因此,我们的结果是直接有效的热力学极限。它们清楚地显示出由相变分离的两个不同的相。我们引入了一个更新策略,使元格条款和高斯定律的约束,以适用于两体算子序列。这允许使用最新的iPEPS算法。通过对空间威尔逊圈的计算,我们证明了受限相的存在。我们表明,相对较低的计算成本,它是可能的重现规范理论的关键功能。我们预计,该战略允许iPEPS研究扩展到更一般的LGTs。

英文摘要:

We simulate a zero-temperature pure $\mathbb{Z}_3$ Lattice Gauge Theory in 2+1 dimensions by using an iPEPS (Infinite Projected Entangled-Pair State) ansatz for the ground state. Our results are therefore directly valid in the thermodynamic limit. They clearly show two distinct phases separated by a phase transition. We introduce an update strategy that enables plaquette terms and Gauss-law constraints to be applied as sequences of two-body operators. This allows the use of the most up-to-date iPEPS algorithms. From the calculation of spatial Wilson loops we are able to prove the existence of a confined phase. We show that with relatively low computational cost it is possible to reproduce crucial features of gauge theories. We expect that the strategy allows the extension of iPEPS studies to more general LGTs.

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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