Gravitational waves from a holographic phase transition

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http://hdl.handle.net/10138/329696

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Ares , F R , Hindmarsh , M , Hoyos , C & Jokela , N 2021 , ' Gravitational waves from a holographic phase transition ' , Journal of High Energy Physics , no. 4 , 100 . https://doi.org/10.1007/JHEP04(2021)100

Title: Gravitational waves from a holographic phase transition
Author: Ares, Feanor Reuben; Hindmarsh, Mark; Hoyos, Carlos; Jokela, Niko
Other contributor: University of Helsinki, Particle Physics and Astrophysics
University of Helsinki, Helsinki Institute of Physics


Date: 2021-04-12
Language: eng
Number of pages: 35
Belongs to series: Journal of High Energy Physics
ISSN: 1029-8479
DOI: https://doi.org/10.1007/JHEP04(2021)100
URI: http://hdl.handle.net/10138/329696
Abstract: We investigate first order phase transitions in a holographic setting of five-dimensional Einstein gravity coupled to a scalar field, constructing phase diagrams of the dual field theory at finite temperature. We scan over the two-dimensional parameter space of a simple bottom-up model and map out important quantities for the phase transition: the region where first order phase transitions take place; the latent heat, the transition strength parameter alpha, and the stiffness. We find that alpha is generically in the range 0.1 to 0.3, and is strongly correlated with the stiffness (the square of the sound speed in a barotropic fluid). Using the LISA Cosmology Working Group gravitational wave power spectrum model corrected for kinetic energy suppression at large alpha and non-conformal stiffness, we outline the observational prospects at the future space-based detectors LISA and TianQin. A TeV-scale hidden sector with a phase transition described by the model could be observable at both detectors.
Subject: 114 Physical sciences
Gauge-gravity correspondence
Cosmology of Theories beyond the SM
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