Abstract
We use the gauge/gravity correspondence to study the gravitational reheating of strongly coupled gauge theories in the rapid exit from the long inflationary (de Sitter) phase. We estimate the maximal reheating temperature of holographic models in d-spatial dimensions, whose scale invariance is explicitly broken by a source term for an operator 𝒪∆ of dimension \( \frac{d}{2}+\frac{1}{2}<\Delta <d+1 \), as well as the top-down 𝒩 = 2* and the cascading gauge theories. The reheating is most efficient when the inflationary phase Hubble constant is much larger than the mass scale of the conformal symmetry breaking of the theory, and for theories with the conformal symmetry breaking operators that are close to marginal.
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Acknowledgments
I would like to thanks Iosif Bena, Elias Kiritsis and Giuseppe Policastro for valuable discussions. I am grateful to The Institute of Theoretical Physics (IPhT) in Saclay for hospitality where part of this work was done. Research at Perimeter Institute is supported in part by the Government of Canada through the Department of Innovation, Science and Economic Development Canada and by the Province of Ontario through the Ministry of Colleges and Universities. This work is further supported by a Discovery Grant from the Natural Sciences and Engineering Research Council of Canada.
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Buchel, A. Gravitational reheating at strong coupling. J. High Energ. Phys. 2023, 159 (2023). https://doi.org/10.1007/JHEP07(2023)159
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DOI: https://doi.org/10.1007/JHEP07(2023)159