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H.M. Murdock
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Here is the news:
http://www.sciencedaily.com/releases/2008/05/080515092615.htm"
http://www.sciencedaily.com/releases/2008/05/080515092615.htm"
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H.M. Murdock said:Here is the news:
http://www.sciencedaily.com/releases/2008/05/080515092615.htm"
p-brane said:Ashtekar's idea is not the first but rather only the latest idea about how to avoid violating unitarity. Hawking in the framework of euclidean quantum gravity and Susskind in string theory both offer solutions. Interestingly, Hawking`s idea actually rests on the assumption of ads/cft. Susskind's approach involves the introduction of a concept called black hole complementarity. Ashtekar's is the least elegant of the three. However I don't find any of them convincing. My opinion is that the real solution is that somehow, black hole degrees of freedom live both on and inside the event horizon, but in a way that doesn't violate the no quantum xerox principle.
Excellent point!nrqed said:Very interesting. I hope you will stick around and provide more details.
For now, I have a very stupid question. I am confused by one thing. I always hear people saying that quantum mechanics "preserves information" and hence is in conflict with GR because of black holes. But the measurement process in QM is not unitary (at least if we use the Copenhagen interpretation). So why do people always say that QM preserves information?
nrqed said:I am confused by one thing. I always hear people saying that quantum mechanics "preserves information" and hence is in conflict with GR because of black holes. But the measurement process in QM is not unitary (at least if we use the Copenhagen interpretation). So why do people always say that QM preserves information?
For an even more explicit (and less technical) discussion of that point see alsoDemystifier said:Excellent point!
This is indeed a part of the information-paradox solution proposed in
http://xxx.lanl.gov/abs/0708.0729
See in particular Sec. 3.
LQG, or loop quantum gravity, is a theory that combines the principles of quantum mechanics and general relativity to describe the structure of space and time at a very small scale. It is related to black holes because it offers a potential solution to the problem of information loss in black holes, which has been a long-standing issue in physics.
According to this research, information escapes from a black hole through a process called "evaporation". This is when particles, known as Hawking radiation, are emitted from the black hole. These particles carry away information from the black hole, allowing it to be retrieved.
There is currently no direct evidence to support this theory, as it is still in the theoretical stage. However, the calculations and simulations used in this research have shown promising results and are consistent with other theories and observations of black holes.
This research has the potential to significantly impact our understanding of black holes and the universe. It offers a potential solution to the information loss problem in black holes, which has been a major obstacle in merging quantum mechanics and general relativity. It also provides new insights into the nature of space and time at a fundamental level.
The next steps for this research include further simulations and calculations to refine the theory and potentially provide more evidence to support it. Additionally, experiments and observations will be needed to test the predictions of this theory and potentially confirm its validity.