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33 papers · 1 filter
Consistent energy-momentum trace couplings of fluids
Christian G. Boehmer, Eissa Al-Nasrallah
Gravitational models with non-minimal couplings involving the trace of the energy-momentum tensor have become increasingly popular. The idea of coupling the trace of the matter ten…
The Science of the Einstein Telescope
Adrian Abac, Raul Abramo, Simone Albanesi +485
Einstein Telescope (ET) is the European project for a gravitational-wave (GW) observatory of third-generation. In this paper we present a comprehensive discussion of its science ob…
Global Hyperbolicity and Self-adjointness
Markus B. Fröb, Albert Much, Kyriakos Papadopoulos
We show that the spatial part of the Klein-Gordon operator is an essentially self-adjoint operator on the Cauchy surfaces of various classes of spacetimes. Our proof employs the in…
Effects of underlying topology on quantum state discrimination
Aatif Kaisar Khan, Yasir Hassan Dar, Elias C. Vagenas +3
In this work, we show that quantum state discrimination can be modified due to a change in the underlying topology of a system. In particular, we explicitly demonstrate that the qu…
Relative Entropy in de Sitter is a Noether Charge
Markus Fröb, Albert Much, Kyriakos Papadopoulos
We compute the relative entropy between the vacuum and a coherent state for a massive scalar field in de Sitter spacetime, using Tomita-Takesaki modular theory and the Araki-Uhlman…
Constraining quantum fluctuations of spacetime foam from BBN
Saurya Das, Gaetano Lambiase, Elias C. Vagenas
A possibility to describe quantum gravitational fluctuations of the spacetime background is provided by virtual -branes. These effects may induce a tiny violation of the Lorentz…