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arXiv 2006.01835hep-thgr-qc
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由$T^2$形变得到的引力路径积分

Gravitational path integral from the $T^2$ deformation

Alexandre Belin, Aitor Lewkowycz, Gabor Sarosi

摘要:

我们研究了大$N$共形场论的$T^2$变形,这是$T\bar T$变形的高维推广。变形的配分函数满足扩散型的流动方程。我们求解这个方程,找到它的扩散核,这是由欧几里德引力路径积分在$d+1$维之间的两个边界与Dirichlet边界条件的度量。这是自然的流量方程和惠勒-德维特方程之间的连接,我们提供了一个新的视角,通过给出一个规范不变的变形配分函数和径向WDW波函数之间的关系。一个有趣的输出的流量方程是重力路径积分措施,这是一致的约束相空间量化。最后,我们讨论了连续傅里叶变换中径向波函数与Hartle-Hawking对偶波函数之间的关系,并提出了一种由$T^2$形变求最大切片体积的方法.

英文摘要:

We study a $T^2$ deformation of large $N$ conformal field theories, a higher dimensional generalization of the $T\bar T$ deformation. The deformed partition function satisfies a flow equation of the diffusion type. We solve this equation by finding its diffusion kernel, which is given by the Euclidean gravitational path integral in $d+1$ dimensions between two boundaries with Dirichlet boundary conditions for the metric. This is natural given the connection between the flow equation and the Wheeler-DeWitt equation, on which we offer a new perspective by giving a gauge-invariant relation between the deformed partition function and the radial WDW wave function. An interesting output of the flow equation is the gravitational path integral measure which is consistent with a constrained phase space quantization. Finally, we comment on the relation between the radial wave function and the Hartle-Hawking wave functions dual to states in the CFT, and propose a way of obtaining the volume of the maximal slice from the $T^2$ deformation.

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