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arXiv 1403.3733hep-thcond-mat.str-elgr-qc
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纠缠熵的微扰计算

Entanglement Entropy: A Perturbative Calculation

Vladimir Rosenhaus, Michael Smolkin

摘要:

我们提供了一个框架的扰动评估的减少密度矩阵。该方法基于解析连续时空中的路径积分。它提出了一种替代全息和“标准”复制品技巧计算的纠缠熵。我们实现这种方法内可解的场论的例子来评估小扰动引起的背景和纠缠表面的几何形状的领导阶校正。我们的结果与Solodukhin的四维CFTs的纠缠熵普适项公式一致。

英文摘要:

We provide a framework for a perturbative evaluation of the reduced density matrix. The method is based on a path integral in the analytically continued spacetime. It suggests an alternative to the holographic and `standard' replica trick calculations of entanglement entropy. We implement this method within solvable field theory examples to evaluate leading order corrections induced by small perturbations in the geometry of the background and entangling surface. Our findings are in accord with Solodukhin's formula for the universal term of entanglement entropy for four dimensional CFTs.

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