An Interacting Two-Fluid Scenario for Quintom Dark Energy  

作　　者：ZHANG Xin 

机构地区：[1]Institute of High Energy Physics, the Chinese Academy of Sciences, P.O. Box 918(4), Beijing 100049, China [2]Graduate School, the Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Communications in Theoretical Physics》2005年第4X期762-768,共7页理论物理通讯（英文版）

基　　金：国家自然科学基金

摘　　要：The Quintom dark energy is a proposal that explains the recent observations that mildly favor the equation of state of dark energy ω crossing -1 near the past. The Quintom model is often constructed by two scalar fields, where one is the quintessence feld and another is the phantom field. The cosmological implication of the coupling of the two fields of the dark energy is out of question worth investigating. However, the consideration of the coupling in the field scenario is somewhat complex thus we propose an interacting two-fluid Quintom scenario for simplicity. The interaction between the two components is parametrized by a constant 71 in this scenario. The cosmological implications of this parametrization are investigated in detail in this paper. Also, a diagnostic for this model is performed by using the statefinder pairs {s, r} and {q, r}.

关 键 词：Quintom dark energy interacting two-fluid scenario statefinder diagnostic 

分 类 号：O572.1[理学—粒子物理与原子核物理]