Exact solutions of modified GST cosmology

Takao Fukui; Kenzo Arai; Masaaki Hashimoto

doi:10.1088/0264-9381/18/11/306

Exact solutions of modified GST cosmology

Takao Fukui, Kenzo Arai, Masaaki Hashimoto

Experimental Particle Physics

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

The generalized scalar-tensor (GST) theory is modified. In the modified GST theory, the cosmological term Λ is a function of the scalar field φ and of its time derivative φ² as well. We obtain exact solutions for the scale factor, the scalar field and the cosmological term which evolves with a different dependence on time for each era of the universe. The cosmological 'constant' and flatness problems are examined in the simple case of a flat universe.

Original language	English
Pages (from-to)	2087-2096
Number of pages	10
Journal	Classical and Quantum Gravity
Volume	18
Issue number	11
DOIs	https://doi.org/10.1088/0264-9381/18/11/306
Publication status	Published - Jun 7 2001

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1088/0264-9381/18/11/306

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AB - The generalized scalar-tensor (GST) theory is modified. In the modified GST theory, the cosmological term Λ is a function of the scalar field φ and of its time derivative φ2 as well. We obtain exact solutions for the scale factor, the scalar field and the cosmological term which evolves with a different dependence on time for each era of the universe. The cosmological 'constant' and flatness problems are examined in the simple case of a flat universe.

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Exact solutions of modified GST cosmology

Abstract

All Science Journal Classification (ASJC) codes

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