• Featured in Physics

Black-hole microstate spectroscopy: Ringdown, quasinormal modes, and echoes

Taishi Ikeda, Massimo Bianchi, Dario Consoli, Alfredo Grillo, Josè Francisco Morales, Paolo Pani, and Guilherme Raposo
Phys. Rev. D 104, 066021 – Published 16 September 2021
Physics logo See synopsis: A Way to Experimentally Test String Theory’s “Fuzzball” Prediction
PDFHTMLExport Citation

Abstract

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.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
3 More
  • Received 25 March 2021
  • Accepted 6 August 2021

DOI:https://doi.org/10.1103/PhysRevD.104.066021

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & AstrophysicsParticles & Fields

synopsis

Key Image

A Way to Experimentally Test String Theory’s “Fuzzball” Prediction

Published 16 September 2021

Simulations reveal the gravitational-wave signal of string theory’s “fuzzy” black holes, a signature that researchers could potentially measure.

See more in Physics

Authors & Affiliations

Taishi Ikeda1, Massimo Bianchi2, Dario Consoli2, Alfredo Grillo2, Josè Francisco Morales2, Paolo Pani1, and Guilherme Raposo1

  • 1Dipartimento di Fisica, “Sapienza” Università di Roma & Sezione INFN Roma1, Piazzale Aldo Moro 5, 00185 Roma, Italy
  • 2Dipartimento di Fisica, Università di Roma “Tor Vergata" & Sezione INFN Roma2, Via della ricerca scientifica 1, 00133 Roma, Italy

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 104, Iss. 6 — 15 September 2021

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×