Markus Hanke Posted December 9, 2021 Share Posted December 9, 2021 For those of you who are interested in this. There’s been a flurry of papers on the subject over the past three years in particular, but it was very difficult to get the big picture. This is a nice, plain language summary. https://www.quantamagazine.org/the-most-famous-paradox-in-physics-nears-its-end-20201029/ 2 Link to comment Share on other sites More sharing options...
MigL Posted December 9, 2021 Share Posted December 9, 2021 Read your linked article; thanks for posting. I don't think I'll ever understand the papers that have led to these conclusions, but they seem to rely on 'mathematical tricks', somewhat similar to renormalization, to make sense of the non-sensical. But if these tricks, such as entanglement entropy and quantum extremal surfaces inside event horizons, point us in the right direction and towards a quantum field theory of gravity ( like Hawking did with his 'semi-quantum' evaporative radiation ) so much the better. Link to comment Share on other sites More sharing options...
geordief Posted December 9, 2021 Share Posted December 9, 2021 (edited) Hopefully will get through the article in time.I like the bit where they are supposedly disappointed to have achieved their aim without needing to have solved quantum gravity as part of the process. Also like the comments at the bottom.(they help me to assimilate the article as they are much easier to read!! ) Edited December 9, 2021 by geordief Link to comment Share on other sites More sharing options...
joigus Posted December 9, 2021 Share Posted December 9, 2021 It seems to be a semiclassical calculation, in which they've thrown in elements of quantum information theory. It's always a good thing that you can get confirmation of robust physical principles from approximate pictures of the physics. Thanks a lot. Link to comment Share on other sites More sharing options...
studiot Posted December 9, 2021 Share Posted December 9, 2021 11 hours ago, Markus Hanke said: For those of you who are interested in this. There’s been a flurry of papers on the subject over the past three years in particular, but it was very difficult to get the big picture. This is a nice, plain language summary. https://www.quantamagazine.org/the-most-famous-paradox-in-physics-nears-its-end-20201029/ I liked the bit about using D'Alembert's statistical mistake with the two coins. Thanks a lot for the reference. +1 1 Link to comment Share on other sites More sharing options...
Markus Hanke Posted December 10, 2021 Author Share Posted December 10, 2021 14 hours ago, joigus said: It seems to be a semiclassical calculation, in which they've thrown in elements of quantum information theory. It's always a good thing that you can get confirmation of robust physical principles from approximate pictures of the physics. Thanks a lot. Indeed. I think it’s important to make this really clear - it’s based on a semiclassical approach, meaning it’s standard GR with standard quantum field theory thrown in, but accounting for more quantum effects than Hawking did. It’s not about full quantum gravity, and only seeks to address the specific issue of the information paradox. I’m personally excited that it appears to further hint at the idea of spacetime not being fundamental, but an emergent phenomenon. Link to comment Share on other sites More sharing options...
swansont Posted December 10, 2021 Share Posted December 10, 2021 ! Moderator Note Discussion on emergent phenomena has been split https://www.scienceforums.net/topic/126248-what-does-emergent-mean-in-a-physics-context-split-from-information-paradox/ Link to comment Share on other sites More sharing options...
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