Quantum geometry and gravitational entropy
| dc.creator | Balasubramanian, Vijay | |
| dc.creator | Czech, Bartlomiej | |
| dc.creator | Marolf, Donald | |
| dc.creator | Larjo, Klaus | |
| dc.creator | Simon, Joan | |
| dc.date | 2007-05-30 | |
| dc.date | 2009-01-30 | |
| dc.date.accessioned | 2026-07-07T13:04:24Z | |
| dc.date.available | 2026-07-07T13:04:24Z | |
| dc.description | Most quantum states have wavefunctions that are widely spread over the accessible Hilbert space and hence do not have a good description in terms of a single classical geometry. In order to understand when geometric descriptions are possible, we exploit the AdS/CFT correspondence in the half-BPS sector of asymptotically AdS_5 x S^5 universes. In this sector we devise a "coarse-grained metric operator" whose eigenstates are well described by a single spacetime topology and geometry. We show that such half-BPS universes have a non-vanishing entropy if and only if the metric is singular, and that the entropy arises from coarse-graining the geometry. Finally, we use our entropy formula to find the most entropic spacetimes with fixed asymptotic moments beyond the global charges. | |
| dc.description | 29 pages, 2 figures; references added | |
| dc.identifier | https://arxiv.org/abs/0705.4431 | |
| dc.identifier | http://arxiv.org/abs/0705.4431 | |
| dc.identifier | JHEP 0712:067,2007 | |
| dc.identifier | doi:10.1088/1126-6708/2007/12/067 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/227150 | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Quantum geometry and gravitational entropy | |
| dc.type | text |