230 citations · 3.3k across the 75 of their papers we have counts for
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In-in formalism for the entropy of quantum fields in curved spacetimes
Thomas Colas, Julien Grain, Greg Kaplanek +1
We show how to compute the purity and entanglement entropy for quantum fields in a systematic perturbative expansion. To that end, we generalize the in-in formalism to non-unitary…
Benchmarking the cosmological master equations
Thomas Colas, Julien Grain, Vincent Vennin
Master equations are commonly employed in cosmology to model the effect of additional degrees of freedom, treated as an "environment", onto a given "system". However, they rely on…
Entropy radiated by a braneworld black hole
Aurelien Barrau, Julien Grain, Carole Weydert
The concept of black hole entropy is one of the most important enigmas of theoretical physics. It relates thermodynamics to gravity and allows substantial hints toward a quantum th…
Semiclassical scalar propagators in curved backgrounds: formalism and ambiguities
J. Grain, A. Barrau
The phenomenology of quantum systems in curved space-times is among the most fascinating fields of physics, allowing --often at the gedankenexperiment level-- constraints on tentat…
Quantum Bound States Around Black Holes
J. Grain, A. Barrau
Quantum mechanics around black holes has shown to be one of the most fascinating fields of theoretical physics. It involves both general relativity and particle physics, opening ne…
A WKB approach to scalar fields dynamics in curved space-time
J. Grain, A. Barrau
Quantum fields exhibit non-trivial behaviours in curved space-times, especially around black holes or when a cosmological constant is added to the field equations. A new scheme, ba…