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arXiv 0811.1968hep-thcond-mat.other
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三维Dirac费米子的纠缠熵:顶点贡献

Entanglement entropy for a Dirac fermion in three dimensions: vertex contribution

H. Casini, M. Huerta, L. Leitao

摘要:

在三维中,由于位于所考虑区域边界的顶点,对纠缠熵的贡献在数学上是发散的。在这项工作中,我们找到了相应的普遍系数的自由狄拉克场,并延长了以前的工作中的标量情况下处理。该问题等价于在三维空间中寻找共形异常,其中场的乘法边界条件施加在平面角扇区上。作为计算的中间步骤,我们计算了二维球中的大质量狄拉克场的格林函数的迹,边界条件施加在大圆的一部分上。

英文摘要:

In three dimensions there is a logarithmically divergent contribution to the entanglement entropy which is due to the vertices located at the boundary of the region considered. In this work we find the corresponding universal coefficient for a free Dirac field, and extend a previous work in which the scalar case was treated. The problem is equivalent to find the conformal anomaly in three dimensional space where multiplicative boundary conditions for the field are imposed on a plane angular sector. As an intermediate step of the calculation we compute the trace of the Green function of a massive Dirac field in a two dimensional sphere with boundary conditions imposed on a segment of a great circle.

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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