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arXiv 2008.12673hep-thgr-qcquant-ph
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微分熵第一定律与全息复杂性

The first law of differential entropy and holographic complexity

Debajyoti Sarkar, Manus Visser

摘要:

我们在三维AdS时空中构造了球面因果钻石第一定律的CFT对偶。AdS $_3$中的球对称因果菱形是具有消失的外部曲率的空间圆盘的依赖域。体第一定律与盘的边界面积、盘的空间体积、宇宙学常数和物质哈密顿量的变化有关。在本文中,我们专注于一阶度规变化从纯AdS的锥形缺陷时空,和散装第一定律推导出以下的坐标为基础的方法。AdS/CFT字典将圆盘边界的面积与CFT $_2$中的微分熵联系起来,并假设“复杂度=体积”猜想,圆盘的体积被认为是截止CFT复杂度的对偶。在CFT方面,我们明确地计算了微分熵和全息复杂度的真空态和激发态对偶锥AdS使用的运动空间形式主义。结果表明,体第一定律的边界对偶将微分熵和复杂性的一阶变化与激发态标度维数的变化联系起来,这对应于体中物质的哈密顿量变化.在边界第一定律中,我们还考虑了中心荷随化学势的变化。最后,我们评论的边界对偶的第一定律的Wheeler-deWitt补丁的AdS,我们提出了一个扩展我们的CFT第一定律到更高的维度。

英文摘要:

We construct the CFT dual of the first law of spherical causal diamonds in three-dimensional AdS spacetime. A spherically symmetric causal diamond in AdS$_3$ is the domain of dependence of a spatial circular disk with vanishing extrinsic curvature. The bulk first law relates the variations of the area of the boundary of the disk, the spatial volume of the disk, the cosmological constant and the matter Hamiltonian. In this paper we specialize to first-order metric variations from pure AdS to the conical defect spacetime, and the bulk first law is derived following a coordinate based approach. The AdS/CFT dictionary connects the area of the boundary of the disk to the differential entropy in CFT$_2$, and assuming the `complexity=volume' conjecture, the volume of the disk is considered to be dual to the complexity of a cutoff CFT. On the CFT side we explicitly compute the differential entropy and holographic complexity for the vacuum state and the excited state dual to conical AdS using the kinematic space formalism. As a result, the boundary dual of the bulk first law relates the first-order variations of differential entropy and complexity to the variation of the scaling dimension of the excited state, which corresponds to the matter Hamiltonian variation in the bulk. We also include the variation of the central charge with associated chemical potential in the boundary first law. Finally, we comment on the boundary dual of the first law for the Wheeler-deWitt patch of AdS, and we propose an extension of our CFT first law to higher dimensions.

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