The universe dominated by oscillating scalar with non-minimal derivative coupling to gravity

Journal Article · Wed Jan 01 00:00:00 EST 2014 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2014/01/031· OSTI ID:22369808

Jinno, Ryusuke; Mukaida, Kyohei; Nakayama, Kazunori ^[1]

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1. Department of Physics, Faculty of Science, University of Tokyo, Bunkyo-ku, Tokyo 133-0033 (Japan)

We study the expansion law of the universe dominated by the oscillating scalar field with non-minimal derivative coupling to gravity as G{sup μν}∂{sub μ}φ∂{sub ν}φ. In this system the Hubble parameter oscillates with a frequency of the effective mass of the scalar field, which formerly caused a difficulty in analyzing how the universe expands. We find an analytical solution for power law potentials and interpret the solution in an intuitive way by using a new invariant of the system. As a result, we find marginally accelerated expansion for the quadratic potential and no accelerated expansion for the potential with higher power.

• OSTI ID: 22369808
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 01; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ANALYTICAL SOLUTION
COUPLING
EFFECTIVE MASS
EXPANSION
GRAVITATION
POTENTIALS
SCALAR FIELDS
UNIVERSE