Energy Density of Non-Minimally Coupled Scalar Field Cosmologies

Details Energy Density of Non-Minimally Coupled Scalar Field Cosmologies Energy Density of Non-Minimally Coupled Scalar Field Cosmologies

1995-01-20

arxiv.org/abs/gr-qc/9501022v1

Phys.Rev. D51 (1995) 2687-2692

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

18 pages in standard LateX

Scientific paper

10.1103/PhysRevD.51.2687

Scalar fields coupled to gravity via $\xi R {\Phi}^2$ in arbitrary Friedmann-Robertson-Walker backgrounds can be represented by an effective flat space field theory. We derive an expression for the scalar energy density where the effective scalar mass becomes an explicit function of $\xi$ and the scale factor. The scalar quartic self-coupling gets shifted and can vanish for a particular choice of $\xi$. Gravitationally induced symmetry breaking and de-stabilization are possible in this theory.

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