期刊
MODERN PHYSICS LETTERS A
卷 36, 期 8, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S021773232130007X
关键词
Quantum gravity; black holes; information problem
资金
- Department of Energy, Office of Science, Office of High Energy Physics [DE-AC02-05CH11231, DE-SC0019380]
The article discusses two descriptions of quantum gravity, which present different pictures in addressing various issues of black hole physics but lead to the same physical conclusions. The perspective developed here is expected to have broader implications beyond black hole physics.
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.
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