论文标题
量子重力模型中的无质量重力
Massless graviton in a model of quantum gravity with emergent spacetime
论文作者
论文摘要
在JHEP 2020，70（2020）中提出的量子重力模型中，动态时空是基本量子物质的集体现象。如果没有首选的希尔伯特空间分解，那么临时时空的签名，拓扑和几何形状取决于希尔伯特（Hilbert）的总空间如何分配到当地的希尔伯特（Hilbert）空间中。在本文中，可以证明，无质量的重力是从希尔伯特空间分解中实现的时空中出现的，该分解支持了一系列在很大程度上未进入本地时钟的集合。
In the model of quantum gravity proposed in JHEP 2020, 70 (2020), dynamical spacetime arises as a collective phenomenon of underlying quantum matter. Without a preferred decomposition of the Hilbert space, the signature, topology and geometry of an emergent spacetime depend upon how the total Hilbert space is partitioned into local Hilbert spaces. In this paper, it is shown that the massless graviton emerges in the spacetime realized from a Hilbert space decomposition that supports a collection of largely unentangled local clocks.
