全息预加热宇宙学模型  

Holographic preheating

作　　者：蔡一夫 林树[4] 刘峻宇 孙佳睿 Cai Yifu;Lin Shu;Liu Junyu;Sun Jiarui(Department of Astronomy,School of Physical Sciences,University of Science and Technology of China,Hefei,230026,China;CAS Key Laboratory for Researches in Galaxies and Cosmology,University of Science and Technology of China,Hefei 230026,China;School of Astronomy and Space Science,University of Science and Technology of China,Hefei 230026,China;School of Physics and Astronomy,Sun Yat-Sen University,Guangzhou 510275,China;Walter Burke Institute for Theoretical Physics,California Institute of Technology,Pasadena,CA 91125,United States)

机构地区：[1]中国科学技术大学物理学院天文学系,安徽合肥230026 [2]中国科学技术大学中科院星系宇宙学重点实验室,安徽合肥230026 [3]中国科学技术大学天文与空间科学学院,安徽合肥230026 [4]中山大学物理与天文学院,广东广州510275 [5]加州理工学院沃尔特·伯克理论物理研究所,帕萨迪纳91125,美国

出　　处：《中国科学技术大学学报》2020年第12期1447-1452,共6页JUSTC

基　　金：the Chinese National Youth Thousand Talents Program(No.KJ2030220006);the USTC start-up(No.KY2030000049);NSFC(Nos.11421303,11653002);the Chinese National Youth Thousand Talents Program;the SYSU Junior Faculty Fund;the physics department at Caltech;the Fund for Fostering Talents in Basic Science of NSFC(No.J1310021);NSFC(No.11205058);by the Fundamental Research Funds for Central Universities;the Open Project Program of State Key Laboratory of Theoretical Physics at CAS(No.Y5KF161CJ1).

摘　　要：提出了一个存在强耦合的宇宙预加热过程的全息理论描述.在这一描述下,极早期宇宙中的暴胀子与物质场之间的能量交换可以通过一个全息超导模型来模拟实现.其中,预加热过程的物质场会经历近乎于指数放大,而这正好可以用边界扩展的整体时空中的亚稳态“黑洞”的准正态模式来刻画.我们的结果揭示了,物质场可以在强耦合环境中连续产生,这与弱耦合情况是截然不同的.此外,在强耦合下的物质场放大对暴胀子真空期望值的依赖性增强.基于我们所提出的理论机制,暴胀结束后尚处于极高温度下的极早期宇宙很可能是可以被探知的.We propose a holographic description of cosmic preheating at strong coupling.In this scenario the energy transfer between the inflaton 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 inflation may become accessible.

关 键 词：宇宙预加热 准正态模式 强耦合 全息原理 

分 类 号：P159.3[天文地球—天文学]