[extropy-chat] Hawking says information *can* escape black holes

scerir scerir at libero.it
Thu Jul 15 14:32:58 UTC 2004

> At the conference, Hawking will have an hour on 21 July to make his case.
> If he succeeds, then, ironically, he will lose a bet that he and
> theoretical physicist Kip Thorne of the California Institute of Technology
> (Caltech) in Pasadena made with John Preskill, also of Caltech.

About that bet read more at the link below.

The GR17, the 17th International Conference
on General Relativity and Gravitation, takes
place from 18th to 23rd July 2004 in Dublin, Ireland,

It seems that Stephen Hawking gives a lecture on
"The information paradox for black holes".

The abstract sounds as:
"The Euclidean path integral over all topologically trivial
metrics can be done by time slicing and so is unitary when
analytically continued to the Lorentzian. On the other hand,
the path integral over all topologically non-trivial metrics
is asymptotically independent of the initial state. Thus
the total path integral is unitary and information is not lost
in the formation and evaporation of black holes. The way the
information gets out seems to be that a true event horizon
never forms, just an apparent horizon".

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