论文标题
从黑洞难题到量子重力的结构
From the Black Hole Conundrum to the Structure of Quantum Gravity
论文作者
论文摘要
我们描绘了量子重力的结构，从最近的进展中出现了，在理解蒸发黑洞的量子力学方面。基于欧几里得重力路径积分和一个单位不断发展的全息量子系统，量子重力接受了两个不同的描述，它们在黑洞的存在下似乎呈现截然不同的图片。然而，这两个描述在物理上是等效的。黑洞物理学的各种问题 - 包括内部的存在，进化的单位性，过大的内部体积的难题以及在某些计算中看到的合奏性质 - 在两个描述中都非常不同，但仍会得出相同的物理结论。预计此处开发的量子重力的观点将在黑洞物理学以外具有更广泛的含义，尤其是对于永恒膨胀多宇宙的宇宙学。
We portray the structure of quantum gravity emerging from recent progress in understanding the quantum mechanics of an evaporating black hole. Quantum gravity admits two different descriptions, based on Euclidean gravitational path integral and a unitarily evolving holographic quantum system, which appear to present vastly different pictures under the existence of a black hole. Nevertheless, these two descriptions are physically equivalent. Various issues of black hole physics---including the existence of the interior, unitarity of the evolution, the puzzle of too large interior volume, and the ensemble nature seen in certain calculations---are addressed very differently in the two descriptions, still leading to the same physical conclusions. The perspective of quantum gravity developed here is expected to have broader implications beyond black hole physics, especially for the cosmology of the eternally inflating multiverse.
