Cosmological constant, information and gedanken experiments with black hole horizons
Center for Cosmology and Astrophysics, Alikhanian National Laboratory and Yerevan State University, Yerevan, Armenia
2 SIA, Sapienza Universita di Roma, Rome, Italy
Accepted: 29 March 2021
Published online: 6 April 2021
The cosmological constant if considered as a fundamental constant provides an information treatment for gravitation problems, both cosmological and of black holes. The efficiency of that approach is shown via gedanken experiments for the information behavior of the horizons for Schwarzschild–de Sitter and Kerr–de Sitter metrics. A notion of entropy regarding any observer and in all possible non-extreme black hole solutions is suggested, linked also to Bekenstein bound. The suggested information approach forbids the existence of naked singularities .
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021