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Black holes do not destroy information - say Astrophysics - VIDEO PDF Print E-mail
Monday, 06 April 2015 03:00

information about the state of matter, contrary to the view of many physicists and cosmologists, does not disappear completely when it gets into a black hole - its traces can be found in the famous Hawking radiation, if it will be possible to detect traces declare Astrophysics in an article published in the journal Physical Review Letters.

Black holes arising from gravitational collapse of massive stars that have such strong gravity that it can not be overcome without exceeding the speed of light. No objects or radiation can not escape from overseas impact of the black hole, which was called "event horizon".
The famous British astrophysicist Stephen Hawking predicted that the fate of the particles produced near the event horizon, can be very different - one of the pair can get behind him and disappear from our world, and the second one can remain "free". Thus, black holes should be the source of the flow of elementary particles, which is called "Hawking radiation". Due to this radiation black holes can gradually "evaporate".

It tells Dejan Stojkovic (Dejan Stojkovic) from the University of Buffalo (USA), the nature of this radiation scientists argue for almost four decades. The problem is that if black holes really behave the way they describe Hawking, then the information on the state of matter that falls into them along with absorbed "food" will be irretrievably lost as evaporation, which is directly contrary to the laws of quantum mechanics .

Part astrophysicists believe that Hawking radiation can carry information about the structure of the black hole and how it gave rise to the matter got into it, which can resolve the "information paradox." Other scientists believe that this does not happen, and that we need another physics to explain the nature of these objects and the process of evaporation.
Stojkovic and his colleagues at the university showed that Hawking radiation can actually transfer the information from the black hole in an external environment. They were able to show it thanks to a new mathematical model of a black hole, which reproduces not only how born Hawking radiation, but also how they interact generated particles.

It clearly showed that an observer standing at the event horizon, and studying the properties of Hawking radiation, can see in the interaction of particles generated by it traces the inner world of the black hole. According to physicists, Hawking radiation contains information about the gravitational interactions inside the black hole, the exchange of photons and other "correlations", as they are called scientists. Such correlations are not immediately visible, and to detect them take a long time, but gradually the picture will become clearer and clearer.

"Our colleagues are aware of these correlations, but ignored them as they seemed to them small and not statistically significant. Our precise calculations show that, even though they are very small at first, they gradually grow and become significant," - explains the physicist.

Thus, according to Stojkovic, his research team was able to resolve the paradox of information loss in a black hole. As a next step astrophysics try to build a new version of the model, in which the observer will not soar above the black hole and fall into it.


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