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117 papers · 1 filter
Multipole decomposition of the gravitational field of a point mass at the black hole horizon
João P. B. Brito, Atsushi Higuchi, Luís C. B. Crispino
The portion of the gravitational energy absorbed by the black hole due to the radial infall of a point mass is known to diverge at leading order in perturbation theory. This diverg…
Entanglement and correlations between local observables in de Sitter spacetime
Patricia Ribes-Metidieri, Ivan Agullo, Béatrice Bonga
Studies of quantum field entanglement in de Sitter space based on the von Neumann entropy of local patches have concluded that curvature enhances entanglement between regions and t…
Exploring quantum fields in rotating black holes
Christiane K. M. Klein
In this paper, we discuss the Unruh state for a free scalar quantum field on Kerr-de Sitter under the assumption of mode stability. We summarise the proof of its Hadamard property…
Waiting around for Unruh
Leo J. A. Parry, Diego Vidal-Cruzprieto, Christopher J. Fewster +1
How long does a uniformly rotating observer need to interact with a quantum field in order to register an approximately thermal response due to the circular motion Unruh effect? We…
Renormalisation in maximally symmetric spaces and semiclassical gravity in Anti-de Sitter spacetime
Benito A. Juárez-Aubry, Milton C. Mamani-Leqque
We obtain semiclassical gravity solutions in the Poincaré fundamental domain of -dimensional Anti-de Sitter spacetime, PAdS, with a (massive or massless) Klein-Gordon fi…
The Hadamard condition on a Cauchy surface and the renormalized stress-energy tensor
Benito A. Juárez-Aubry, Bernard S. Kay, Tonatiuh Miramontes +1
Given a Cauchy surface in a curved spacetime and a suitably defined quantum state on the CCR algebra of the Klein-Gordon quantum field on that surface, we show, by expanding the sq…