Quintessence Field as a Perfect Cosmic Fluid of Constant Pressure

作     者：刘文中 欧阳君 杨焕雄 

作者机构：Interdisciplinary Center for Theoretical StudyUniversity of Science and Technology of China 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2015年第63卷第3期

页      面：391-400页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：Supported in part by National Natural Science Foundation of China under Grant No.11235010 

主　　题：dark energy quintessence 

摘      要：We study the cosmology of a quintessence scalar held which is equivalent to a non-barotropic perfect fluid of constant *** coincidence problem is alleviated by such a quintessence equation-of-state that interpolates between plateau of zero at large redshifts and plateau of minus one as the redshift approaches to *** quintessence Geld is neither a unified dark matter nor a mixture of cosmological constant and cold dark matter,relying on the facts that the quintessence density contrasts of sub-horizon modes would undergo a period of late-time dechne and the squared sound speeds of quintessence perturbations do not *** a role does the quintessence play is dynamic dark energy,its clustering could remarkably reduce the growth rate of the density perturbations of non-relativistic matters.