Holographic preheating

CAI Yifu; LIN Shu; LIU Junyu; SUN Jiarui

doi:10.3969/j.issn.0253-2778.2020.12.001

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Open Access JUSTC Research Letter

Holographic preheating

1.
Department of Astronomy, School of Physical Sciences, University of Science and Technology of China, Hefei, 230026, China
2.
CAS Key Laboratory for Researches in Galaxies and Cosmology, University of Science and Technology of China, Hefei 230026, China
3.
School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, China
4.
School of Physics and Astronomy, Sun Yat-Sen University, Guangzhou 510275, China
5.
Walter Burke Institute for Theoretical Physics, California Institute of Technology, Pasadena, CA 91125, United States

Funds: We are grateful to R. Brandenberger, S. Carroll, Y. Hu, H. Lu, A. Marciano, R. X. Miao, R. Niu, W. Y. Wen and Y Yang. for valuable communications. YFC is supported in part by the Chinese National Youth Thousand Talents Program ( No. KJ2030220006), by the USTC start-up (No. KY2030000049) and by NSFC (Nos. 11421303, 11653002). SL is supported in part by the Chinese National Youth Thousand Talents Program and by the SYSU Junior Faculty Fund. JL is supported in part by the physics department at Caltech and by the Fund for Fostering Talents in Basic Science of NSFC (No. J1310021). JRS is supported in part by NSFC (No. 11205058), by the Fundamental Research Funds for Central Universities and by the Open Project Program of State Key Laboratory of Theoretical Physics at CAS ( No. Y5KF161CJ1 ). Part of numerics are operated on the computer cluster LINDA in the particle cosmology group at USTC.

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https://doi.org/10.3969/j.issn.0253-2778.2020.12.001

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Corresponding author: Cai Yifu is a professor of physics and astronomy at University of Science and Technology of China ( USTC). He received the PhD degree in theoretical physics at Institute of High Energy Physics in 2010. He worked as a postdoc at Arizona State University and McGill University until 2015. He was selected into the Chinese National Youth Talents Program in and became a faculty at USTC. His particle cosmology grou2p01a5t USTC is responsible for the scientific goals of the AliCPT project associated with cosmological models. His research focuses on fundamental questions for cosmology, namely, the big bang singularity, the origin and destiny of the universe, the cosmological perturbation theory and the CMB theory. E-mail: yifucai@ustc.edu.cn
Received Date: 08 May 2020
Accepted Date: 10 July 2020
Publish Date: 30 December 2020

Abstract Full text PDF

Abstract

Abstract

We propose a holographic description of cosmic preheating at strong coupling. In this scenario the energy transfer between the inflation and matter field is mimicked by a model of holographic superconductor. An exponential amplification of the matter field during preheating can be described by the quasi-normal modes of a metastable " black hole" in the bulk spacetime with an expanding boundary. Our results reveal that the matter field can be produced continuously at strong coupling in contrast to the case of weak coupling with a discontinuous matter growth as inflaton oscillates. Furthermore, the amplification of matter field has an enhanced dependence on the vacuum expectation value of the inflaton at strong coupling. By virtue of the proposed mechanism, physics of the very early universe at an extremely high temperature right after inflaton may become accessible.

Abstract

We propose a holographic description of cosmic preheating at strong coupling. In this scenario the energy transfer between the inflation and matter field is mimicked by a model of holographic superconductor. An exponential amplification of the matter field during preheating can be described by the quasi-normal modes of a metastable " black hole" in the bulk spacetime with an expanding boundary. Our results reveal that the matter field can be produced continuously at strong coupling in contrast to the case of weak coupling with a discontinuous matter growth as inflaton oscillates. Furthermore, the amplification of matter field has an enhanced dependence on the vacuum expectation value of the inflaton at strong coupling. By virtue of the proposed mechanism, physics of the very early universe at an extremely high temperature right after inflaton may become accessible.