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arXiv 1807.04646hep-thgr-qc
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由CFT的纠缠熵计算体几何

Bulk geometry from entanglement entropy of CFT

Ashis Saha, Sourav Karar, Sunandan Gangopadhyay

摘要:

在本文中,我们使用全息原理计算了从$(1+1)$维共形场论中出现的体几何的精确形式。首先考虑Poincare坐标系下的$(2+1)$维渐近$AdS$度规,利用全息纠缠熵理论,计算了静态最小表面$γ_A$对应的面积泛函,得到了纠缠熵.然后,我们使用的纠缠熵的$(1+1)$-维共形场论的无限线上,在有限温度下的无限线上和在一个圆圈上的结果。将这些结果与全息纠缠熵进行比较,我们能够提取出体度规的正确结构。最后,我们还在$\mathcal{N}=4$ super Yang-Mills理论的情况下进行了分析,得到了对应于该理论的对偶体几何的精确形式.分析揭示了在近边界区域和深内的散装度量的行为。结果还显示了边界紫外截止"$a$"对体度规的影响。据观察,重建的度量完全匹配与文献中的已知结果,当一个移动到深处的散装或朝向转折点。

英文摘要:

In this paper, we compute the exact form of the bulk geometry emerging from a $(1+1)$-dimensional conformal field theory using the holographic principle. We first consider the $(2+1)$-dimensional asymptotic $AdS$ metric in Poincare coordinates and compute the area functional corresponding to the static minimal surface $γ_A$ and obtain the entanglement entropy making use of the holographic entanglement entropy proposal. We then use the results of the entanglement entropy for $(1+1)$-dimensional conformal field theory on an infinite line, on an infinite line at a finite temperature and on a circle. Comparing these results with the holographic entanglement entropy, we are able to extract the proper structure of the bulk metric. Finally, we also carry out our analysis in the case of $\mathcal{N}=4$ super Yang-Mills theory and obtain the exact form of the dual bulk geometry corresponding to this theory. The analysis reveals the behavior of the bulk metric in both the near boundary region and deep inside the bulk. The results also show the influence of the boundary UV cut-off "$a$" on the bulk metric. It is observed that the reconstructed metrics match exactly with the known results in the literature when one moves deep inside the bulk or towards the turning point.

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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