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Fluctuation with dust of de Sitter ground state of scalar-tensor gravity |
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| Authors: | YanKe Tang HongSheng Zhang ChiYi Chen XinZhou Li |
| Affiliation: | 1. Department of Physics, Dezhou University, Dezhou, 253023, China 2. Shandong Provincial Key Laboratory of Functional Macromolecular Biophysics, Dezhou University, Dezhou, 253023, China 3. Center for Astrophysics, Shanghai Normal University, Shanghai, 200234, China 4. State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190, China 5. Hangzhou Normal University, Hangzhou, 310036, China 6. Shanghai United Center for Astrophysics, Shanghai Normal University, Shanghai, 200234, China |
| Abstract: | 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. |
| Keywords: | scalar tensor gravity de Sitter space dark energy phantom divide |
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