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arXiv 1606.03385hep-latcond-mat.str-elquant-ph
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有限温度下施温格模型的汉密尔顿模拟

Hamiltonian simulation of the Schwinger model at finite temperature

Boye Buyens, Frank Verstraete, Karel Van Acoleyen

摘要:

采用矩阵乘积算子(MPO)对Schwinger模型进行了热平衡模拟。构造了规范不变MPO的变分流形来表示Gibbs态。作为第一个应用,计算了热平衡的手征凝聚体,发现与以前的研究结果一致.此外,作为一个新的应用,研究了具有相互分离无限远的分数带电静态夸克-反夸克对的Schwinger模型.发现了一个临界温度,超过该温度,弦张力被指数抑制,这与强耦合极限下的分析研究定性一致。最后,CT对称性破缺的调查和我们的结果强烈表明,对称性恢复在任何非零温度。

英文摘要:

Using Matrix Product Operators (MPO) the Schwinger model is simulated in thermal equilibrium. The variational manifold of gauge invariant MPO is constructed to represent Gibbs states. As a first application the chiral condensate in thermal equilibrium is computed and agreement with earlier studies is found. Furthermore, as a new application the Schwinger model is probed with a fractional charged static quark-antiquark pair separated infinitely far from each other. A critical temperature beyond which the string tension is exponentially suppressed is found, which is in qualitative agreement with analytical studies in the strong coupling limit. Finally, the CT symmetry breaking is investigated and our results strongly suggest that the symmetry is restored at any nonzero temperature.

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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