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kodama

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what is the interpretation of hawking radiation in string theory?

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- Thread starter kodama
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In summary, there is currently no definitive answer on whether string theory can reproduce Hawking radiation in non-extremal black holes in 4D or if there is a string theory equivalent of this phenomenon. However, there have been some developments in Loop Quantum Gravity that suggest a simpler and more intuitive explanation for black hole entropy and radiation, making more contact with established physics.

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kodama

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what is the interpretation of hawking radiation in string theory?

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I think the best answer is - nobody knows so far.

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kodama

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Demystifier said:I think the best answer is - nobody knows so far.

is there a string theory equivalent of this?

https://arxiv.org/abs/1612.05364

Pierre Heidmann, Hongguang Liu, Karim Noui

(Submitted on 16 Dec 2016)

We introduce the notion of fluid approximation of a quantum spherical black hole in the context of Loop Quantum Gravity. In this limit, the microstates of the black hole are intertwiners between "large" representations si" role="presentation">si

which typically scale as si∼aH" role="presentation">si∼√aH where aH" role="presentation">aH denotes the area of the horizon in Planck units. The punctures with large colors are, for the black hole horizon, similar to what are the fluid parcels for a classical fluid. We dub them puncels. Hence, in the fluid limit, the horizon is composed by puncels which are themselves interpreted as composed (in the sense of the tensor product) by a large number of more fundamental intertwiners. We study the spectrum of the euclidean volume acting on puncels and we compute its quantum fluctuations. Then, we propose an interpretation of black holes radiation based on the properties of the quantum fluctuations of the euclidean volume operator. We estimate a typical temperature of the black hole and we show that it scales as the Hawking temperature.

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mitchell porter

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kodama

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mitchell porter said:

in terms of occam's razor, LQG's results as referenced in the paper for non-extremel hawking radiation in 4D seem simpler and more intuitive, makes more contact with established physics than strings as described by the above. hawking showed black holes have entropy and emit radiation, and LQG seems to offer the microstates that account for both more simply than strings.

String theory is a theoretical framework that attempts to reconcile the two major theories of physics, general relativity and quantum mechanics. It proposes that the fundamental building blocks of the universe are not particles, but tiny vibrating strings. In the context of black holes, string theory is used to explain the behavior of matter and energy at the singularity, the point of infinite density at the center of a black hole.

Yes, according to string theory, Hawking radiation can indeed be reproduced in non-extremal black holes. This is because string theory considers black holes to have a "fuzziness" or a "hair" of strings surrounding the event horizon, which allows for the escape of particles and energy.

Hawking radiation is a theoretical type of radiation that is predicted to be emitted by black holes due to quantum effects near the event horizon. It is named after physicist Stephen Hawking, who proposed its existence in 1974. According to Hawking's theory, black holes are not completely black, but actually emit a small amount of radiation, causing them to slowly lose mass and eventually evaporate.

Yes, string theory can explain the behavior of Hawking radiation in non-extremal black holes in 4D. In fact, string theory predicts that the radiation emitted by black holes should follow the same pattern as Hawking radiation, with a thermal spectrum and a gradual decrease in mass over time.

If string theory is able to successfully reproduce Hawking radiation in non-extremal black holes in 4D, it could provide a more complete understanding of the behavior of black holes and the nature of space and time. It could also have important implications for the study of quantum gravity and the unification of all the fundamental forces of nature.

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