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Newfound Wormhole Allows Information to Escape Black Holes
- platz 9y agoI believe Susskind was of the opinion that that one could create an ER=EPR wormhole between two entangled black holes, and that jumping into one of the black holes would allow one to access the wormhole, and meet someone "in the middle" who had jumped into the other wormhole, but it would be impossible after that for either person to get out of the wormhole. Additionally, because the entropy of the wormhole increases with time, the "length" of the wormhole seems to also increase with time.
- philipov 9y agoA black hole is a fast scrambler and very quickly comes to thermal equilibrium (max entropy). However, the complexity continues to increase long after thermal equilibrium, and that's what is thought to be analogous to the length of the wormhole growing (at the speed of light, no less). [0]: https://www.youtube.com/watch?v=9crggox5rbc&t=1202s https://www.youtube.com/watch?v=9crggox5rbc&t=1202s
- platz 9y agoThis is the "traversable" part: throw a qubit into black hole A. Measure a particle of its Hawking radiation & transmit the result of the measurement through the external universe to the other black hole B; then use this knowledge to operate on a Hawking particle coming out of black hole B to "reconstruct" the original qubit.
- drewrv 9y agoI feel like if I were a pop science writer I would spin this more as a "teleportation" story.
- ars 9y ago> throw a qubit into black hole A This would take infinite time (from the POV of the external observer), so I'm unclear how this is supposed to work.
- ewjordan 9y agoOnly in strict GR - when quantum effects are taken into account, the entire black hole will evaporate into Hawking radiation in a finite time.
- pdonis 9y ago> Only in strict GR Even in strict GR, the statement is not correct. See my response upthread.
- pdonis 9y ago> This would take infinite time (from the POV of the external observer) No, that's not correct. What is correct is that, in the idealized case where the hole is eternal (i.e., it never evaporates), it would take an infinite time for the external observer to see the qubit cross the horizon. But the qubit reaches the horizon and crosses it in a finite time.
- ars 9y agoBut we are talking about an external observer - so how is this traversable plan going to work?
- shroom 9y agoThis article was an interesting read even though I know close to nothing about quantum mechanics. The part you highlight made me think of Diffie-Hellman key change. Silly but looking at the "octopus" it's like Hawking radition is SSH connections to the inside of the black hole :-)
- akvadrako 9y agoYou forget the part where the wormholes need to be prepared. First you need to feed the hawking radiation from one black hole into another.
- mankyd 9y agoWhen the call a wormhole "traversable" does this mean that an macroscopic object can actually survive a wormhole intact? Or are the referring to something more along the lines of a sub-atomic particle? edit: the article eventually starts talking about "qubits" explicitly, so I am assuming this is sub-atomic particles only unless someone knows more. Even more specifically, it says that which falls into A comes out of B as Hawking radiation. You can then transfer an external message (at the speed of light) between A and B to turn that Hawking radiation into the original object via hand-wavy quantum teleportation. I get the feeling that you'd have to trap _all_ of the relevant, escaping radiation from B to actually reconstruct your object.
- QAPereo 9y agoDefinitely the latter, “traversible” means “in principle”
- dogma1138 9y agoFrom what I understand they are describing a mechanism through which information can escape black holes. The problem with black holes is that a classical black hole would result in loss of information which is a big no no. The initial proposal for Hawking radiation lacked a mechanism through which information can escape the black hole this wormhole of sorts provides this mechanism. I’m not entirely sure how different it is to the holographic principle in which the information is encoded on the surface of the black hole which allowed the Hawking radiation to “pick up” a bit of information on its way back sort of like light projector.
- pdonis 9y ago> From what I understand they are describing a mechanism through which information can escape black holes. A hypothesized mechanism. None of this has any experimental confirmation, nor is any likely any time soon. It's an interesting theoretical advance, but that's all.
- dogma1138 9y agoYes everything here is theoretical including the Hawking radiation itself.
- creep 9y agoI KNEW IT
- dang 9y agoHi! I'm a moderator here. Please don't post unsubstantive comments like this to HN. The idea is to have thoughtful discussion. You're welcome here as long as you want to use the site as intended. To get an idea of what that is, please read https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html and https://news.ycombinator.com/newswelcome.html https://news.ycombinator.com/newswelcome.html.
- mirimir 9y agoDoesn't "Newfound Wormhole Allows Information to Escape Black Holes" rather strain the meaning of "found"? I get that it's "found" in a mathematical sense. But in a physical sense, it's more like "possible".
- gt_ 9y agoSome of the better political safire I’ve read in while.