POSSIBLE UNITARITY OF BLACK HOLE EVAPORATION

Series: 
Theoretical Physics Division seminar
Speaker and affiliation: 
Prof. dr hab. Bogusław Broda, Department of Theoretical Physics, Faculty of Physics and Applied Informatics, University of Łódz, Łódz, Poland
Date: 
Wed, 2019-10-30 12:15 to 13:30
Venue: 
sala 404, Pasteura 7
Abstract: 

In the framework of finite-dimensional Fock space models, for a fixed given mean number of particles $\bar{n}_{k}$, blackbody-like or another, it is shown that there are, in the space $S$ of all pure states, a multi-dimensional subspace $s_{\bar{n}_{k}}$ of initial pure states and a corresponding multi-dimensional subspace $S_{\bar{n}_{k}}$ of final pure states yielding $\bar{n}_{k}$, which are mutually related by a unitary transformation. In consequence, in particular, as an example, it follows that the blackbody form itself of the Hawking spectrum does not contradict unitarity of black hole evaporation.

 

 

                                                                                            Serdecznie zapraszamy, 

        M. Kowal, W. Piechocki, J. Skalski, L. Szymanowski