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How the Black Hole Firewall Paradox Was Resolved

Posted by Soulskill on from the black-holes-are-made-of-cantaloupes dept.

Stephen Hawking's recent comments about the nature of black holes have bred uncertainty about physics concepts that were relatively well understood. This article from astrophysicist Ethan Siegel explains that yes, black holes still exist, and how a group of three academic papers answered the black hole 'firewall' paradox. Quoting: "... And so what these three papers, in tandem, have done, is demonstrate that there is no firewall and that the resolution to the firewall paradox is that the first assumption, that Hawking radiation is in a pure state, is the one that's flawed. You won't read about this in the popular write-ups because it doesn't have a catchy headline, it's complex, and it's not work by someone that's already very famous for other work. But it's right. Hawking radiation is not in a pure state, and without that pure state, there's no firewall, and no paradox. There is still an incredible amount to learn and understand about black holes, event horizons, and the behavior of quantum systems in strongly curved spacetime, to be sure, and there's lots of very interesting research ahead. These findings arguably raise more questions than they answer, although at least we know that black holes won't fry you when you fall in; it will still be death by spaghettification, not by incineration!"

5 of 118 comments (clear)

  1. Begs the question by alaskana98 · · Score: 5, Insightful

    "death by spaghettification" Perhaps this is the ultimate end for a 'Flying Sphaghetti Monster' fearing Pastafarian? Ramen!

    1. Re:Begs the question by Anonymous Coward · · Score: 5, Funny

      Black holes are some of the most dramatic events the cosmos: As round and powerful as his meaty balls, and within spaghettified as his noodly appendages.

      Ramen, indeed. The proof of His divine influence is writ in all scales throughout the heavenly quantum sauce.

  2. "But it's right." by Gaygirlie · · Score: 5, Insightful

    No, this is all still highly theoretical and you cannot state that this hypothesis is absolutely, definitely correct. It may be correct, it may well be the best theory we have and all that, but it's still a theory.

  3. Re:I always thought... by wisnoskij · · Score: 5, Informative

    The problem with that is that black holes need the mass they suck in to exist.

    The mass cannot both be in the black hole and shot out the other side into a new universe.

    So unless you can come up with a theory that has black holes creating mass out of nothing, that is simply impossible.

    --
    Troll is not a replacement for I disagree.
  4. Re:I always thought... by Anonymous Coward · · Score: 5, Informative

    No it isn't. A cosmological model is a foliation of maximally-symmetric spacelike hypersurfaces. A black hole is not maximally-symmetric. A black hole is a non-evolving system -- it possesses at least one timelike Killing vector -- and a cosmological system is the exact opposite, an evolving system that has no timelike Killing vector. The only real similarity is that a black hole (as you're doubtless meaning it; a Schwarzschild solution) is spherically symmetric, and the spacelike slices in a cosmological spacetime are also spherically symmetric. But so is flat Minkowski space, and so are Tolman-Bondi spaces.