期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 1, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2022/01/014
关键词
quantum black holes; gravity
资金
- Swedish Research Council [2020-04980]
- Foundation for Polish Science under the project Team-Net NTQC [17C1/18-00]
- Foundation for Polish Science (IRAP project, ICTQT - EU within Smart Growth Operational Programme) [2018/MAB/5]
- Swedish Research Council [2020-04980] Funding Source: Swedish Research Council
In 1974, Steven Hawking showed that black holes emit thermal radiation, leading to the black hole information paradox. This study explores the second possibility of the fate of information, using recent developments in continuous-variable quantum information. The results suggest that the thermality of all individual Hawking modes is consistent with a global pure state of the radiation.
In 1974 Steven Hawking showed that black holes emit thermal radiation, which eventually causes them to evaporate. The problem of the fate of information in this process is known as the black hole information paradox. Two main types of resolution postulate either a fundamental loss of information in Nature - hence the breakdown of quantum mechanics - or some sort of new physics, e.g. quantum gravity, which guarantee the global preservation of unitarity. Here we explore the second possibility with the help of recent developments in continuous-variable quantum information. Concretely, we employ the solution to the Gaussian quantum marginal problem to show that the thermality of all individual Hawking modes is consistent with a global pure state of the radiation. Surprisingly, we find out that the mods of radiation of an astrophysical black hole are thermal until the very last burst. In contrast, the single-mode thermality of Hawking radiation originating from microscopic black holes, expected to evaporate through several quanta, is not excluded, though there are constraints on modes' frequencies. Our result paves the way towards a systematic study of multi-mode correlations in Hawking radiation.
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