Quantum backreaction on chronology horizons
Sign Up to like & getrecommendations! Published in 2022 at "Journal of High Energy Physics"
DOI: 10.1007/jhep02(2022)182
Abstract: We extend in two directions our recent investigation of strongly interacting quantum fields in a class of spacetimes with chronology horizons (Misner spacetimes). First, we generalize to arbitrary dimensions the holographic mechanism of chronology protection… read more here.
Keywords: chronology; backreaction chronology; chronology horizons; quantum backreaction ... See more keywords
Backreaction in strong field QED: A toy model
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.101.056022
Abstract: As a toy model for QED in strong background fields, we consider the impact of backreaction and loop effects on scattering processes in quantum optics. We show that neglecting backreaction misses qualitative and quantitative features… read more here.
Keywords: toy model; strong field; qed; model ... See more keywords
Production and backreaction of fermions from axion- SU(2) gauge fields during inflation
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.101.083528
Abstract: $SU(2)$ gauge fields and axions can have a stable, isotropic and homogeneous configuration during inflation. However, couplings to other matter species lead to particle production, which in turn induces backreaction on and destabilization of the… read more here.
Keywords: production backreaction; backreaction fermions; inflation; production ... See more keywords
Cosmic backreaction and the mean redshift drift from symbolic regression
Sign Up to like & getrecommendations! Published in 2023 at "Physical Review D"
DOI: 10.1103/physrevd.107.103522
Abstract: The possibility of obtaining symbolic expressions for cosmic backreaction is explored through a case study of so-called 2-region models. By using the publicly available symbolic regression algorithm AI Feynman, it is shown that the kinematical… read more here.
Keywords: backreaction; region; redshift; redshift drift ... See more keywords
Cosmic backreaction and Gauss's law
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review D"
DOI: 10.1103/physrevd.95.124009
Abstract: Cosmic backreaction refers to the general question of whether a homogeneous and isotropic cosmological model is able to predict the correct expansion dynamics of our inhomogeneous Universe. One aspect of this issue concerns the validity… read more here.
Keywords: gauss law; cosmic backreaction; backreaction; backreaction gauss ... See more keywords
Quantum Backreaction on Three-Dimensional Black Holes and Naked Singularities.
Sign Up to like & getrecommendations! Published in 2017 at "Physical review letters"
DOI: 10.1103/physrevlett.118.131102
Abstract: We analytically investigate backreaction by a quantum scalar field on two rotating Bañados-Teitelboim-Zanelli (BTZ) geometries: that of a black hole and that of a naked singularity. In the former case, we explore the quantum effects… read more here.
Keywords: three dimensional; quantum backreaction; backreaction three; dimensional black ... See more keywords
Machine Learning Cosmic Backreaction and Its Effects on Observations.
Sign Up to like & getrecommendations! Published in 2023 at "Physical review letters"
DOI: 10.1103/physrevlett.130.201003
Abstract: Symbolic expressions for cosmic backreaction and mean redshift drift in a range of two-region models in terms of average quantities are presented. The demonstration that these expressions can be obtained constitutes the opening of a… read more here.
Keywords: learning cosmic; backreaction; machine learning; cosmic backreaction ... See more keywords