caa a22 4500 445386053 CHVBK 20180317143032.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s10714-010-0984-6 doi (NATIONALLICENCE)springer-10.1007/s10714-010-0984-6 Barnich Glenn Physique Théorique et Mathématique, Université Libre de Bruxelles & International Solvay Institutes, Campus Plaine CP 231, Bruxelles, Belgium aut The Coulomb solution as a coherent state of unphysical photons [Elektronische Daten] [Glenn Barnich] In the context of the problem of what micro-states are responsible for the entropy of black holes, we consider as a physical toy model the electromagnetic Coulomb solution. By quantizing the electromagnetic field in the presence of an external source of charge Q, the quantum state corresponding to the Coulomb solution is identified as a coherent state of longitudinal and temporal photons in a Hilbert space with negative norm states. Springer Science+Business Media, LLC, 2010 Black hole entropy nationallicence Microstates nationallicence Gauge degrees of freedom nationallicence Quantum Coulomb solution nationallicence General Relativity and Gravitation Springer US; http://www.springer-ny.com 43/9(2011-09-01), 2527-2530 0001-7701 43:9<2527 2011 43 10714 https://doi.org/10.1007/s10714-010-0984-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10714-010-0984-6 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Barnich Glenn Physique Théorique et Mathématique, Université Libre de Bruxelles & International Solvay Institutes, Campus Plaine CP 231, Bruxelles, Belgium aut NATIONALLICENCE 773 0- General Relativity and Gravitation Springer US; http://www.springer-ny.com 43/9(2011-09-01), 2527-2530 0001-7701 43:9<2527 2011 43 10714 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer