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.
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)
