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arXiv 2103.14640hep-thgr-qc
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Lovelock引力中的重整化全息纠缠熵

Renormalized holographic entanglement entropy in Lovelock gravity

Giorgos Anastasiou, Ignacio J. Araya, Robert B. Mann, Rodrigo Olea

摘要:

研究了与Lovelock引力对偶的全息CFTs中纠缠熵的重整化。我们知道Lovelock引力中的全息EE是由Jacobson-Myers(JM)泛函给出的。通常,由于渐近AdS空间的边界度量的费曼-格雷厄姆展开中的发散外尔因子,这个熵泛函是无穷大的。通过考虑Kounterterm重整化过程,它利用外部的边界反项,以重整化壳层上的Lovelock引力作用量的AAdS时空,我们提出了一个新的重整化处方的Jacobson-Myers功能。然后,我们明确地显示取消的发散EE下一个领先的顺序在全息径向坐标,球形纠缠表面的情况下。利用这个新的重整化公式,我们直接找到了偶偶维和奇维CFTs对偶于Lovelock引力的$C-$函数候选。我们的结果说明了显着的改进,Kounterterterm方法提供了其他方法,因为它是非微扰,并不需要洛夫洛克理论限制爱因斯坦行为。

英文摘要:

We study the renormalization of Entanglement Entropy in holographic CFTs dual to Lovelock gravity. It is known that the holographic EE in Lovelock gravity is given by the Jacobson-Myers (JM) functional. As usual, due to the divergent Weyl factor in the Fefferman-Graham expansion of the boundary metric for Asymptotically AdS spaces, this entropy functional is infinite. By considering the Kounterterm renormalization procedure, which utilizes extrinsic boundary counterterms in order to renormalize the on-shell Lovelock gravity action for AAdS spacetimes, we propose a new renormalization prescription for the Jacobson-Myers functional. We then explicitly show the cancellation of divergences in the EE up to next-to-leading order in the holographic radial coordinate, for the case of spherical entangling surfaces. Using this new renormalization prescription, we directly find the $C-$function candidates for odd and even dimensional CFTs dual to Lovelock gravity. Our results illustrate the notable improvement that the Kounterterm method affords over other approaches, as it is non-perturbative and does not require that the Lovelock theory has limiting Einstein behavior.

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