Scalar-tensor gravity with a non-minimally coupled Higgs field and accelerating universe

Sim, Jonghyun; Lee, Tae Hoon

doi:10.3938/jkps.68.725

Cited by 2 publications

(2 citation statements)

References 17 publications

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“…Eqs. ( 17) and (18) give us constraints, 0 ≤ Ω φ ≤ 1 and 0 ≤ Ω om ≤ 1. The equation of state for the total energy and pressure and the equation of state regarding to the Brans-Dicke field are given by…”

Section: Effective Potentialmentioning

confidence: 99%

“…In the standard model of particle physics Higgs-like fields have been studied to explain the primordial [17] and the late-time acceleration of the Universe [18], and extended Higgs models containing the Einstein tensor coupled, kinetic energy term have been examined in [19][20][21]. Scalara e-mail: ssujhsim@gmail.com tensor theories have been also studied to explain the latetime acceleration of the Universe [22,23].…”

Section: Introductionmentioning

confidence: 99%

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Dynamical analysis of Brans–Dicke universe with inverse power-law effective potential

2020

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We study Brans-Dicke cosmology with an inverse power-law effective potential. By using dynamical analyses, we search for fixed points corresponding to the radiationlike matter and dark energy-dominated era of our Universe, and the stability of fixed points is also investigated. We find phase space trajectories which are attracted to the stable point of the dark energy-dominated era from unstable fixed points like matter-dominated era of the Universe. The dark energy comes from effective potentials of the Brans-Dicke field, whose variation (related to the time-variation of the gravitational coupling constant) is shown to be in good agreement with observational data.

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Section: Effective Potentialmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamical analysis of Brans–Dicke universe with inverse power-law effective potential

2020

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Quintessence from virtual dark matter

Damdinsuren¹,

Sim²,

Lee³

2017

Class. Quantum Grav.

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Considering a theory of Brans–Dicke gravity with general couplings of Higgs-like bosons including a non-renormalizable term, we derive the low-energy effective theory action in the Universe of a temperature much lower than the Higgs-like boson mass. Necessary equations containing gravitational field equations and an effective potential of the Brans–Dicke scalar field are obtained, which are induced through virtual interactions of the Higgs-like heavy field in the late-time Universe. We find a de Sitter cosmological solution with the inverse power law effective potential of the scalar field and discuss the possibility that the late-time acceleration of our Universe can be naturally explained by means of the solution. We also investigate stability properties of the quintessence model by using a linear approximation.

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Scalar-tensor gravity with a non-minimally coupled Higgs field and accelerating universe

Cited by 2 publications

References 17 publications

Dynamical analysis of Brans–Dicke universe with inverse power-law effective potential

Dynamical analysis of Brans–Dicke universe with inverse power-law effective potential

Quintessence from virtual dark matter

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