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arXiv 2104.08170hep-latquant-ph
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格点Schwinger模型的态密度

Density of States of the lattice Schwinger model

Irene Papaefstathiou, Daniel Robaina, J. Ignacio Cirac, Mari Carmen Bañuls

摘要:

使用最近推出的张量网络方法,我们研究的状态密度的格点Schwinger模型,一个标准的测试平台格点规范理论数值技术,而且最近的实验量子模拟的对象。我们确定制度的参数,频谱似乎是对称的,并显示预期的连续属性,即使是有限的晶格间距和网站数量。然而,我们发现,对于适度的系统尺寸和晶格间距的$ga\sim O(1)$,谱密度可以表现出非常不同的性质与高度不对称的形式。我们还探讨了如何利用该方法来提取热力学量。

英文摘要:

Using a recently introduced tensor network method, we study the density of states of the lattice Schwinger model, a standard testbench for lattice gauge theory numerical techniques, but also the object of recent experimental quantum simulations. We identify regimes of parameters where the spectrum appears to be symmetric and displays the expected continuum properties even for finite lattice spacing and number of sites. However, we find that for moderate system sizes and lattice spacing of $ga\sim O(1)$, the spectral density can exhibit very different properties with a highly asymmetric form. We also explore how the method can be exploited to extract thermodynamic quantities.

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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