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Infrared Structure of Gravity and Information Paradox of Black Holes

Alavi Zadeh, Jalal Addin | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56815 (04)
  4. University: Sharif University of Technology
  5. Department: Physics
  6. Advisor(s): Faraji Astaneh, Amin
  7. Abstract:
  8. According to general theory of relativity, collapse of matter under gravitational force leads to the formation of black holes. Considering the quantum effect shows that black holes have thermal radiation which cause them to evaporate. After a complete evaporation, the state of radiation can not contain all information of initial matter. In other word, this process does not obey unitary evolution of quantum mechanics. This is called the black hole information paradox, which has been one of the most challenging problem of theoretical physics for several recent decades. Recently, a deep connections between asymptotic symmetries, soft graviton theorem and gravitational memory effect has been found by Strominger et.al. These notions were being treated separately for many years, but now we can consider them related in infrared structure of gravity. In this thesis, we review the notions of asymptotic symmetries, their associated conserved charges during a gravitational scattering process and their relations with soft graviton theorem. Then we discuss that how they can influence the process of formation and evaporation of black hole. Finally we argue that in this context, one can tackle some of pre-assumptions of information paradox and come up with some new ideas to resolve the problem
  9. Keywords:
  10. Black Hole Information Paradox ; Gravitational Scattering ; Conserved Charges ; Asymptotic Symmetry

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