37 ms·
This 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 t
by platz 9y ago
This 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?
- tinix 9y agoIt's not, because this is all theoretical. Not a single thing here has ever been proven experimentally. Black holes do not exist, nor does hawking radiation.
- lz400 9y ago[citation needed]
- whiskers08xmt 9y agoThere's no direct proof yet, but we have detected the magnetic fields that theories predict, and of course observe the gravitational effects. The Event Horizon Telescope[0] will probably deliver something more tangible by 2018. [0]http://www.nature.com/news/how-to-hunt-for-a-black-hole-with-a-telescope-the-size-of-earth-1.21693 http://www.nature.com/news/how-to-hunt-for-a-black-hole-with...
- gcb0 9y ago> pov so, light. which is not the medium used. I known nothing of quatum shrnanigans, but I am thinking that in terms of protocols :)
- akvadrako 9y agoWhich is a good way to do it. QM is basically the most general protocol possible and most of the math can be derived from assumptions about what can in principle be communicated. For example: http://www.mdpi.com/1099-4300/19/3/98/htm http://www.mdpi.com/1099-4300/19/3/98/htm
- 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.