RT Journal Article
T1 Correlations across horizons in quantum cosmology
A1 Alonso Serrano, Ana
A1 Garay Elizondo, Luis Javier
A1 Mena Marugán, Guillermo A.
AB Different spacetime regions separated by horizons are not related to each other. We know that this statement holds for classical spacetimes. In this paper we carry out a canonical quantization of a Kantowski-Sachs minisuperspace model whose classical solutions exhibit both an event horizon and a cosmological horizon in order to check whether the above statement also holds from the quantum gravitational point of view. Our analysis shows that in fact this is not the case: Quantum gravitational states with support in spacetime configurations that exclusively describe either the region between horizons or outside them are not consistent in the sense that there exist unitary operators describing a natural notion of evolution that connect them. In other words, unitarity is only preserved in this quantization when dealing with the whole spacetime and not in each region separately.
PB American Physical Society
SN 1550-7998
YR 2014
FD 2014
LK https://hdl.handle.net/20.500.14352/33843
UL https://hdl.handle.net/20.500.14352/33843
LA eng
NO © 2014 American Physical Society. A. A.-S. is grateful to A. Ashtekar, M. Fernández Méndez, and P. Martín Moruno for conversations. The authors acknowledge financial support from MICINN/ MINECO Grant No. FIS2011-30145-C03-02 from Spain.
NO MICINN/ MINECO (Spain)
DS Docta Complutense
RD 11 may 2025