2024-03-29T13:57:23Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1609792020-12-13T09:17:10Zcom_10261_97com_10261_4com_10261_135col_10261_350col_10261_388
Exponential fading to white of black holes in quantum gravity
Barceló, Carlos
Carballo Rubio, Raúl
Garay, Luis Javier
Claude Leon Foundation
Universidad de Granada
Junta de Andalucía
Ministerio de Economía y Competitividad (España)
15 pags., app.
Quantization of the gravitational field may allow the existence of a decay channel of black holes into white holes with an explicit time-reversal symmetry. The definition of a meaningful decay probability for this channel is studied in spherically symmetric situations. As a first nontrivial calculation, we present the functional integration over a set of geometries using a single-variable function to interpolate between black-hole and white-hole geometries in a bounded region of spacetime. This computation gives a finite result which depends only on the Schwarzschild mass and a parameter measuring the width of the interpolating region. The associated probability distribution displays an exponential decay law on the latter parameter, with a mean lifetime inversely proportional to the Schwarzschild mass. In physical terms this would imply that matter collapsing to a black hole from a finite radius bounces back elastically and instantaneously, with negligible time delay as measured by external observers. These results invite to reconsider the ultimate nature of astrophysical black holes, providing a possible mechanism for the formation of black stars instead of proper general relativistic black holes. The existence of both this decay channel and black stars can be tested in future observations of gravitational waves.
Financial support was provided by the Spanish MINECO through the projects FIS2011-30145-C03-01, FIS2011-30145-C03-02, FIS2014-54800-C2-1, FIS2014-54800-C2-2 (with FEDER contribution), and by the Junta de Andalucía through the project FQM219. R.C-R. acknowledges support, at different stages of the elaboration of this work, from the Math Institute of the University of Granada (IEMath-GR), the research project MINECO-FEDER MTM2013-47828-C2-1-P, and the Claude Leon Foundation.
Peer Reviewed
2018-02-20T09:39:59Z
2018-02-20T09:39:59Z
2017-04-19
2018-02-20T09:40:00Z
artículo
http://purl.org/coar/resource_type/c_6501
doi: 10.1088/1361-6382/aa6962
issn: 1361-6382
Classical and Quantum Gravity 34: 105007(2017)
http://hdl.handle.net/10261/160979
10.1088/1361-6382/aa6962
http://dx.doi.org/10.13039/501100001337
http://dx.doi.org/10.13039/501100006393
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100011011
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info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2014-54800-C2-2-P
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2014-54800-C2-1
MINECO/FIS2011-30145-C03-01
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MTM2013-47828-C2-1-P
MINECO/FIS2011-30145-C03-02
Preprint
https://doi.org/10.1088/1361-6382/aa6962
Sí
open
Institute of Physics Publishing