On 6 December 2013 14:35, meekerdb <meeke...@verizon.net> wrote:

> Yeah, that's Susskinds firewall idea.  Just above the event horizon,
> within a few Planck lengths, the strings corresponding to stuff that fell
> in are spread over the surface and their degrees of freedom account for the
> entropy.  But the same information also falls into the singularity - which
> violates the no-cloning theorem.  I think Susskind holds that's this is OK
> since nobody can see the violation.  But it's far from settled.  The
> problem is that QM says information should be preserved but GR says it
> should be lost in a BH.  It's widely assumed that GR is wrong and a quantum
> theory of gravity will show information somehow comes out with the Hawking
> radiation.

I read something about an elephant falling into a black hole and being in
an eternal superposition - one elephant on the event horizon and one
crushed in the singularity, the idea being that this was a quantum
superposition and both states were "equally real". (It was probably in "New
Scientist"...) All sounds a bit postmodern. I think the idea was to do a
"Schrodinger's cat" on black holes, and bring out something "paradoxical"
about our understanding of them (with apologies to Kermit).

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