100 citations · 138 across the 8 of their papers we have counts for
11 papers · 1 filter
Quantum Fluctuations of the Black Hole Horizon
Ben Freivogel, Antony Speranza, Erik Verlinde
Classical black holes have sharply defined event horizons, but quantum mechanically the horizon acquires a quantum uncertainty, called the `quantum width' by Marolf. We propose a d…
An intrinsic cosmological observer
Antony J. Speranza
There has been much recent interest in the necessity of an observer degree of freedom in the description of local algebras in semiclassical gravity. In this work, we describe an ex…
Holographic observers for time-band algebras
Kristan Jensen, Suvrat Raju, Antony J. Speranza
We study the algebra of observables in a time band on the boundary of anti-de Sitter space in a theory of quantum gravity. Strictly speaking this algebra does not have a commutant…
Gravitational algebras and the generalized second law
Thomas Faulkner, Antony J. Speranza
We derive the generalized second law (GSL) for arbitrary cuts of Killing horizons from the perspective of crossed-product gravitational algebras, making use of a recent proposal by…
A covariant regulator for entanglement entropy: proofs of the Bekenstein bound and QNEC
Jonah Kudler-Flam, Samuel Leutheusser, Adel A. Rahman +2
While von Neumann entropies for subregions in quantum field theory universally contain ultraviolet divergences, differences between von Neumann entropies are finite and well-define…
Generalized entropy for general subregions in quantum gravity
Kristan Jensen, Jonathan Sorce, Antony Speranza
We consider quantum algebras of observables associated with subregions in theories of Einstein gravity coupled to matter in the limit. When the subregion is spat…