Gravitons in a box
Gravitons in a box
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DOI：
10.1103/physrevd.104.066019
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发表时间：
2021-09-16
影响因子：
5
通讯作者：
Toros, Marko
中科院分区：
文献类型：
--
作者：
Bose, Sougato;Mazumdar, Anupam;Toros, Marko
引力和物质是普遍耦合的，这种独特的普遍性为我们提供了一种有趣的方法，用给定盒子内引力子的数量来量化时空的量子方面。特别地，如果我们追踪物质的自由度，我们提供了引力子数量的限制。我们得到了引力子个数的普适界，它由N-g近似于（m/M-p）（2）给出。由于引力子的数量也表示它们占据的玻色子态的数量，引力子的数量间接地限制了系统的引力熵。我们表明，它饱和的贝肯斯坦约束的引力面积定律的熵。基于这些观测，我们确定了在可观测宇宙中渗透的引力子总是N-g >> 1。
Gravity and matter are universally coupled, and this unique universality provides us with an intriguing way to quantify quantum aspects of space-time in terms of the number of gravitons within a given box. In particular, we provide a limit on the number of gravitons if we trace out the matter degrees of freedom. We obtain the universal bound on the number of gravitons, which would be given by N-g approximate to (m/M-p)(2). Since the number of gravitons also signifies the number of bosonic states they occupy, the number of gravitons indirectly constrain the system's gravitational entropy. We show that it saturates the Bekenstein bound on the gravitational area law of entropy. Based on these observations, we ascertain that the gravitons permeating in the observable Universe are always N-g >> 1.