Fluctuation with dust of de Sitter ground state of scalar-tensor gravity  

作　　者：TANG YanKe ZHANG HongSheng CHEN ChiYi LI XinZhou 

机构地区：[1]Department of Physics,Dezhou University [2]Shandong Provincial Key Laboratory of Functional Macromolecular Biophysics,Dezhou University [3]Center for Astrophysics,Shanghai Normal University [4]State Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences [5]Hangzhou Normal University [6]Shanghai United Center for Astrophysics,Shanghai Normal University

出　　处：《Science China(Physics,Mechanics & Astronomy)》2014年第3期411-417,共7页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the Program for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning;the National Education Foundation of China(Grant No.200931271104);the National Natural Science Foundation of China(Grant Nos.11075106,11275128,11203006 and 11303003);Shandong Provincial Natural Science Foundation of China(Grant Nos.ZR2012AQ029 and ZR2013AM002);Nature Science Foundation of Zhejiang Province(Grant No.Y6110778)

摘　　要：An exact de Sitter solution of scalar-tensor gravity is found in our recent work, in which the non-minimal coupling scalar is rolling along a non-constant potential. Based on this solution, a dust-filled FRW universe is explored in frame of scalar-tensor gravity in this article. The effective dark energy induced by the sole non-minimal scalar can be quintessence-like, phantom-like, and more significantly, can cross the phantom divide. The rich and varied properties of scalar-tensor gravity even with only one scalar is shown.An exact de Sitter solution of scalar-tensor gravity is found in our recent work,in which the non-minimal coupling scalar is rolling along a non-constant potential.Based on this solution,a dust-filled FRW universe is explored in frame of scalar-tensor gravity in this article.The efective dark energy induced by the sole non-minimal scalar can be quintessence-like,phantom-like,and more significantly,can cross the phantom divide.The rich and varied properties of scalar-tensor gravity even with only one scalar is shown.

关 键 词：scalar tensor gravity de Sitter space dark energy phantom divide 

分 类 号：P14[天文地球—天体物理]