中国科学院大学学报2025，Vol.42Issue(6)：729-737,9.DOI:10.7523/j.ucas.2024.029
带荷玻色-费米系统的暗能量
Charged boson-fermion system as cosmic dark energy
摘要
Abstract
The physical origin of the observed acceleration of the universe has not been well understood.Within the framework of general relativity,dark energy is commonly introduced as being independent of other cosmic components,but such models have certain arbitrariness.In this paper,we consider a low-temperature system for dark energy based on the standard model of particle physics.This system consists of a charged boson condensate,a degenerate fermion gas,and a non-electromagnetic U(1)gauge field that couples both components and is constrained by charge conservation.The charged boson condensate has negative pressure and acts as dark energy,while the degenerate Fermi gas with opposite charge is a secondary component.With this boson-fermion system,we find that the accelerating cosmic expansion occurs for a broad range of model parameters.The dust component decreases with the expansion,the energy density of the boson-fermion component remains nearly constant,and the acceleration occurs at a redshift z～0.7.Within the reasonable parameter space,this model provides a good explanation for the observational data of type Ⅰa supernova and baryon acoustic oscillations.关键词
宇宙学/暗能量/加速膨胀/带荷玻色-费米模型Key words
cosmology/dark energy/accelerating expansion/charged boson-fermion system分类
天文与地球科学引用本文复制引用
肖伟楠,叶翾,张杨,A.Marcianò..带荷玻色-费米系统的暗能量[J].中国科学院大学学报,2025,42(6):729-737,9.基金项目
国家自然科学基金(11961131007,12261131497)和国家重点研发计划专项(2021YFC2203100)资助 （11961131007,12261131497）
