期刊
PHYSICAL REVIEW D
卷 104, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.104.066021
关键词
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资金
- Region Ile de France
- project Equip@Meso of the programme Investissements d'Avenir by the Agence Nationale pour la Recherche [ANR-10-EQPX-29-01]
- European Union's H2020 ERC [DarkGRA-757480]
- FARE programme (GW-NEXT) [CUP: B84I20000100001]
- Amaldi Research Center - MIUR program Dipartimento di Eccellenza [CUP: B81I18001170001]
- GWverse COST Action [CA16104]
- University of Roma Tor Vergata [ID1202]
- MIUR PRIN programme
This passage discusses the fuzzball paradigm in string theory as a way to address conceptual problems associated with classical black holes, and describes the numerical simulations of scalar field propagation on a large class of multicenter geometries with no spatial isometries. The results show evidence for the dynamical linear stability of fuzzballs and pave the way for accurate discrimination between fuzzballs and black holes using gravitational-wave spectroscopy.
Deep conceptual problems associated with classical black holes can be addressed in string theory by the fuzzball paradigm, which provides a microscopic description of a black hole in terms of a thermodynamically large number of regular, horizonless, geometries with much less symmetry than the corresponding black hole. Motivated by the tantalizing possibility to observe quantum gravity signatures near astrophysical compact objects in this scenario, we perform the first 3 + 1 numerical simulations of a scalar field propagating on a large class of multicenter geometries with no spatial isometries arising from N = 2 four-dimensional supergravity. We identify the prompt response to the perturbation and the ringdown modes associated with the photon sphere, which are similar to the black-hole case, and the appearance of echoes at later time, which is a smoking gun of some structure at the horizon scale and of the regular interior of these solutions. The response is in agreement with an analytical model based on geodesic motion in these complicated geometries. Our results provide the first numerical evidence for the dynamical linear stability of fuzzballs, and pave the way for an accurate discrimination between fuzzballs and black holes using gravitational-wave spectroscopy.
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