On Tuesday, May 8, 2018 at 12:30:51 PM UTC-5, John Clark wrote: > > On Mon, May 7, 2018 at 1:01 AM, Brent Meeker <meek...@verizon.net > <javascript:>> wrote: > > > >> * an atomic clock lowered to near the event horizon will measure the >> frequency of a photon that is a few ev far from the black to have very high >> energy. So what looks like low temperature Hawking radiation at infinity >> will look like high temperature for the object suspended near the horizon, >> because that objects internal "clocks" run slower than when it was at >> infinity.* >> > > If I was hovering just outside the Event Horizon in a super powerful > spaceship I could observe the Black Hole evaporating in just a few minutes, > even though for you who is far away in a much weaker gravitational field > that would take many trillions of years; the only problem is I would also > observe many trillions of years worth of Hawking Radiation in just a few > minutes, and that would cook me. However if I had no spaceship and was just > freely falling through the Event Horizon the Hawking Radiation wouldn't > bother me at all; or at least that was the idea before 5 or 6 years ago > when the firewall/ entanglement business came up which seems to say even > the freely falling man will be cooked at the Event Horizon, he would reach > the Planck temperature which is about 10^32 K, but I don't understand Black > Hole Firewalls worth a damn. > > http://www.nature.com/news/astrophysics-fire-in-the-hole-1.12726#b8 >
You have this right with respect to the time situation. An accelerated observer close to the horizon witnesses lots of Hawking radiation and highly blue shifted as well. The firewall occurs because Hawking radiation that is emitted is entangled with the black hole. However, once the black hole is reduced to half its mass more of the Hawking radiation is entangled with the black hole and previously emitted Hawking radiation. This means previously emitted Hawking radiation in a 2-way or bipartite entanglement is now in a 3-way or tripartite entanglement. This is not a unitary process in quantum mechanics. > > > > Most Hawking radiation originates where the tidal forces are the greatest, > and that would be at the Event Horizon. The closer I hover above the Event > Horizon the slower my clock will tick, so if I hover close enough I can > watch the entire Black Hole evaporate away in just a few minutes by my > clock even though for you back on Earth that would take a billion trillion > years or so. The thing that causes Black Hole evaporation is Hawking > radiation, so if I observe one I'm going to have to observe the other, > although "observe" may not be the right word, "incinerate" might be better. > > This pertains to the accelerated observer. An inertial observer witnesses most Hawking radiation occurring at around 4m or twice the radius as the horizon radius. This radiation is the same an accelerated observer would witness. There is a sort of nonlocality at play. LC > > I understand > why after half the Black Hole has evaporated further radiated photons > would, on the face of it, be entangled with 3 things, and if that is > forbidden by quantum mechanics then one of those entanglements would need > to be broken > . > > But > what I don't understand is why breaking the > quantum > link with the Black Hole would make things hot. > > Joseph Polchinski, they guy who came up with the firewall idea said: > > > > *“It’s a violent process, like breaking the bonds of a molecule, and it > releases energy.The energy generated by severing lots of twins would be > enormous. The event horizon would literally be a ring of fire that burns > anyone falling through”* > But why? Why would breaking quantum entanglement release energy and > produce heat, what does one have to do with the other? > > I hope somebody on the list who understands Black Hole Firewalls better > than I do can explain this to me. > > John K Clark > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
