A Generalized Semi-Holographic Universe  

作　　者：LI Hui ZHANG Hong-Sheng ZHANG Yi 李辉;张宏升;张益(Department of Physics,Yantai University,30 Qingquan Road,Yantai 264005;Shanghai United Center for Astrophysics(SUCA),Shanghai Normal University,100 Guilin Road,Shanghai 200234;College of Mathematics and Physics,Chongqing University of Posts and Telecommunications,Chongqing 400065;State Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190;High Energy Physics Division,Argonne National Laboratory,Lemont,IL 60439,USA)

机构地区：[1]Department of Physics,Yantai University,30 Qingquan Road,Yantai 264005 [2]Shanghai United Center for Astrophysics(SUCA),Shanghai Normal University,100 Guilin Road,Shanghai 200234 [3]College of Mathematics and Physics,Chongqing University of Posts and Telecommunications,Chongqing 400065 [4]State Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190 [5]High Energy Physics Division,Argonne National Laboratory,Lemont,IL 60439,USA

出　　处：《Chinese Physics Letters》2013年第8期220-224,共5页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 10747155,11205131,11075106,11005164,11175270 and 10935013;the Program for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning,Shanghai Municipal Pujiang under Grant No 10PJ1408100;CQ CSTC under Grant No 2010BB0408;the Argonne National Laboratory.

摘　　要：We study the semi-holographic idea in the context of decaying dark components.The energy flow between dark energy and the compensating dark matter is thermodynamically generalized to involve a particle number variable dark component with non-zero chemical potential.It is found that,unlike the original semi-holographic model,no cosmological constant is needed for a dynamical evolution of the universe.A transient phantom phase appears while a non-trivial dark energy-dark matter scaling solution stays at a later time,which evades the big-rip and helps to resolve the coincidence problem.For reasonable parameters,the deceleration parameter is well consistent with current observations.The original semi-holographic model is extended and it also suggests that the concordance model may be reconstructed from the semi-holographic idea.

关 键 词：POTENTIAL PROBLEM HOLOGRAPHIC 

分 类 号：O17[理学—数学]