Condensation of a scalar field non-minimally coupled to gravity in a\n cosmological context

2018/07/19 by Amir Ghalee, Ghalee, Amir
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Geophysics and Gravity Measurements #Pulsars and Gravitational Waves Research

paper · pdf · doi:10.48550/arxiv.1807.08620

openalex publication_date 2018/07/19 · openalex created_date 2022/08/04 · openalex updated_date 2026/07/28

Abstract

We present a new mechanism to condense a scalar field coupled to the\nGauss-Bonnet term. We propose a scenario in which the condensed state will\nemerge from the background energy density in the late-Universe. During the\nradiation and dust-dominated eras, the energy density of the scalar field,\n\ρ_\φ, decreases at a slower rate than the background density.\nEventually, \ρ_\φ dominates over the energy density of dust and the\nscalar field could be condensed. In the condensed phase, we have the de Sitter\nphase for the universe with \ρ_\φ=3H₀²M_P². Moreover, we study\nthe cosmological perturbations of the model and explore predictions of the\nmodel.\n

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