Information Lost and Information Regained - An overview of the black hole information paradox (A. Kidambi)

  • Date: Mar 5, 2015
  • Time: 11:30 AM - 01:00 PM (Local Time Germany)
  • Speaker: Abhiram Kidambi, MPP, Munich, Germany
  • Room: Herbert Walther Lecture Hall
  • Host: MPQ, Theory Division
Black holes are one of the most mysterious concepts in physics and carry with them a large number of unsolved problems and counterintuitive results, none of which are more troubling than the information paradox.

The black hole information paradox, proposed by Stephen Hawking in 1976, revealed unitarity violation in black hole evaporation. Hawking showed that when a pure quantum state enters a black hole, it should be released in the form of thermal radiation during black hole evaporation thereby violating unitarity. In the recent years, there has been an increase in interest from the quantum gravity community with the aim of understanding and resolving this paradox. Attempts to save unitarity have resulted in even more counterintuitive paradoxes which boils down to the incompatibility between quantum mechanics, the equivalence principle and effective field theory principles. In this talk, I will give a non-technical and unbiased overview of the black hole information paradox (both original and current) and current status of resolution schemes.

Most of the community is divided on the resolution schemes. The quantum origin of these resolution schemes are largely unclear. It is fair to say that there is no unanimously favoured resolution yet.

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