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 Information Escaping Black Holes
In August 2015, Stephen Hawking made a presentation where he proposed a way information could escape destruction in a black hole. See links below:
https://www.youtube.com/watch?v=DkRDmJpthXg
Hawking Proposal
On January 5th, 2016, Hawking, Perry, and Strominger submitted a paper to arXiv.org that has expanded upon that initial idea and provided some details.
Here is the abstract to that paper:
It has recently been shown that BMS supertranslation symmetries imply an infinite
number of conservation laws for all gravitational theories in asymptotically Minkowskian
spacetimes. These laws require black holes to carry a large amount of soft (i.e. zeroenergy)
supertranslation hair. The presence of a Maxwell field similarly implies soft
electric hair. This paper gives an explicit description of soft hair in terms of soft
gravitons or photons on the black hole horizon, and shows that complete information
about their quantum state is stored on a holographic plate at the future boundary of
the horizon. Charge conservation is used to give an infinite number of exact relations
between the evaporation products of black holes which have different soft hair but are
otherwise identical. It is further argued that soft hair which is spatially localized to
much less than a Planck length cannot be excited in a physically realizable process,
giving an effective number of soft degrees of freedom proportional to the horizon area
in Planck units.
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Re: Soft Hair on Black Holes
