Observational constraint on dark energy from quantum uncertainty  

作　　者：Long Huang Xiaofeng Yang Xiang Liu 黄龙;杨晓峰;刘祥(Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China;Laboratory of Radio Astronomy,Chinese Academy of Sciences,Nanjing 210008,China;Key Laboratory of Radio Astrophysics in Xinjiang Province,Urumqi 830011,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China [2]Laboratory of Radio Astronomy,Chinese Academy of Sciences,Nanjing 210008,China [3]Key Laboratory of Radio Astrophysics in Xinjiang Province,Urumqi 830011,China [4]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Physics C》2021年第12期184-192,共9页中国物理C（英文版）

基　　金：Supported by Xiaofeng Yang’s Xinjiang Tianchi Bairen project and CAS Pioneer Hundred Talents Program;partly supported by the National Key R&D Program of China (2018YFA0404602)

摘　　要：We explore the theoretical possibility that dark energy density is derived from massless scalar bosons in vacuum and present a physical model for dark energy. By assuming massless scalar bosons fall into the horizon boundary of the cosmos with the expansion of the universe, we can deduce the uncertainty in the relative position of scalar bosons based on the quantum fluctuation of space-time and the assumption that scalar bosons satisfy P-symmetry under the parity transformation Pφ(r) =-φ(r), which can be used to estimate scalar bosons and dark energy density. Furthermore, we attempt to explain the origin of negative pressure from the increasing entropy density of the Boltzmann system and derive the equation for the state parameter, which is consistent with the specific equations of state for dark energy. Finally, we employ the SNIa Pantheon sample and Planck 2018 CMB angular power spectra to constrain the models and provide statistical results for the cosmology parameters.

关 键 词：scalar bosons P-symmetry quantum fluctuations dark energy SNIa CMB 

分 类 号：P145.9[天文地球—天体物理]