Kavli Affiliate: Pau Amaro Seoane
| First 5 Authors: Pau Amaro Seoane, Pau Amaro Seoane, , ,
| Summary:
The existence of curvature singularities and the information and firewall
paradoxes are significant problems for the conventional black hole model. The
black mirror hypothesis provides a CPT-symmetric alternative to the classical
description of black hole, offering a novel solution to these long-standing
issues. We show that classical black holes can, in principle, be distinguished
from black mirrors observationally, by using gravitational waves. The principal
challenge is to identify a unique, testable signature of the black mirror’s
reflective horizon that can be detected by current or future observatories. The
horizon singularity of the black mirror model necessitates that no energy flux
is propagated beyond the horizon, which can be described effectively by
imposing specific boundary conditions at the event horizon. Our analysis
demonstrates that the quasi-normal mode spectrum of the black mirror is
fundamentally different from that of classical black holes, as purely ingoing
modes are forbidden. Moreover, we show that the reflectivity of the black
mirror does not depend on any free parameter; it is given precisely by the
Boltzmann factor, which is independent of the dissipation parameter, indicating
a universal behaviour regardless of the specific underlying quantum dynamics at
the horizon. A definitive detection of the predicted gravitational wave echoes
would provide compelling evidence distinguishing the reflective boundary of a
black mirror from the perfectly absorbing horizon of a classical black hole.
Extreme Mass Ratio Inspirals (EMRIs) are ideal probes for this test, as their
long-duration signals allow for the secular accumulation of these faint echoes,
offering a concrete pathway to challenge the classical paradigm and
revolutionise our understanding of spacetime.
| Search Query: ArXiv Query: search_query=au:”Pau Amaro Seoane”&id_list=&start=0&max_results=3