arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.06300hep-th
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$T\bar{T}$形变的随机边界几何和重力对偶

Random Boundary Geometry and Gravity Dual of $T\bar{T}$ Deformation

Shinji Hirano, Masaki Shigemori

摘要:

研究了Cardy发展的二维共形场论的$T\bar{T}$形变的随机几何方法,并讨论了它在引力对偶中的实现.在这种表示中,$T\bar{T}$变形的引力对偶成为场论语言的直接翻译。也就是说,对偶几何是AdS $_3$空间或BTZ黑洞的系综,没有有限截止,而是具有随机波动的边界自同构。这反映了通过不相关的$T\bar{T}$操作符在重整化群流到UV中的自由度的增加。我们简化了计算方法,并以一种可以直接翻译成引力对偶语言的方式计算能谱和热自由能。我们进一步将这种方法推广到关联函数,并用不同的方法再现了Cardy计算的具有普遍对数校正的全阶结果。与以前的建议相比,这个版本的重力对偶的$T\bar{T}$变形的作品不仅为能谱和热自由能,但也为关联函数。

英文摘要:

We study the random geometry approach to the $T\bar{T}$ deformation of 2d conformal field theory developed by Cardy and discuss its realization in a gravity dual. In this representation, the gravity dual of the $T\bar{T}$ deformation becomes a straightforward translation of the field theory language. Namely, the dual geometry is an ensemble of AdS$_3$ spaces or BTZ black holes, without a finite cutoff, but instead with randomly fluctuating boundary diffeomorphisms. This reflects an increase in degrees of freedom in the renormalization group flow to the UV by the irrelevant $T\bar{T}$ operator. We streamline the method of computation and calculate the energy spectrum and the thermal free energy in a manner that can be directly translated into the gravity dual language. We further generalize this approach to correlation functions and reproduce the all-order result with universal logarithmic corrections computed by Cardy in a different method. In contrast to earlier proposals, this version of the gravity dual of the $T\bar{T}$ deformation works not only for the energy spectrum and the thermal free energy but also for correlation functions.

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