
TL;DR
This paper explores how quantum effects in corpuscular black holes lead to a surface slightly outside the classical horizon, causing potential echoes and backscattering of signals, with implications for black hole quantum structure.
Contribution
It demonstrates that corpuscular black holes have a quantum-induced surface causing echoes and backscattering, linking compactness to graviton interaction strength.
Findings
Existence of a quantum surface at R=R_s(1+1/N)
Potential for high-probability backscattering of Hawking-temperature signals
Echo delays comparable to the black hole scrambling time
Abstract
In the corpuscular picture of black hole there exists no geometric notion of horizon which, instead, only emerges in the semi-classical limit. Therefore, it is very natural to ask - what happens if we send a signal towards a corpuscular black hole? We show that quantum effects at the horizon scale imply the existence of a surface located at an effective radius slightly larger than the Schwarzschild radius where and is the number of gravitons composing the system. Consequently, the reflectivity of the object can be non-zero and, indeed, we find that incoming waves with energies comparable to the Hawking temperature can have a probability of backscattering of order one. Thus, modes can be trapped between the two potential barriers located at the photon sphere and at the surface of a corpuscular black hole, and periodic echoes can be produced.…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
