3 papers
gr-qc2026
Evolving Dark Energy from the Back-Reaction of Cosmological Perturbations
Vincent Comeau
We argue that the back-reaction of inhomogeneities, when combined with a pure cosmological constant, produces an effective dark energy whose equation of state can evolve with time.…
hep-th2022
Clock Fields and Logarithmic Decay of Dark Energy
Robert Brandenberger, Vincent Comeau, Leonardo Fossati +1
We investigate the physical measurability of the infrared instability of a de Sitter phase in the formalism recently proposed by Kitamoto et al.. We find that the logarithmic decay…
hep-th2019
Further Results on a Function Relevant for Conformal Blocks
Vincent Comeau, Jean-François Fortin, Witold Skiba
We present further mathematical results on a function appearing in the conformal blocks of four-point correlation functions with arbitrary quasi-primary operators. The -function…