Nonlinear resonant oscillation of gravitational potential induced by ultralight axion in 
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 gravity

Aoki, Arata; Soda, Jiro

doi:10.1103/physrevd.96.023534

Cited by 19 publications

(6 citation statements)

References 50 publications

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“…[58]. The motivation to study such axionic inflationary Lagrangians mainly comes from the fact that the axion, or axion like particles, are quite appealing candidates for particle dark matter, see [59,60], and also [61][62][63][64][65]. To our opinion, the axion is the last resort of particle dark matter, but the predicted mass is too tiny to be measured at present day.…”

Section: Introductionmentioning

confidence: 99%

Chirality of Gravitational Waves in Chern-Simons $f(R)$ Gravity Cosmology

Odintsov,

Oikonomou

2022

Preprint

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In this paper we shall consider an axionic Chern-Simons corrected f (R) gravity theoretical framework, and we shall study the chirality of the generated primordial gravitational waves. Particularly, we shall consider two main axion models, the canonical misalignment axion model and the kinetic axion model, both of which provide an interesting particle phenomenology, in the presence of R 2 terms in the inflationary Lagrangian. The axion does not affect significantly the background evolution during the inflationary era, which is solely controlled by R 2 gravity. However, the due to the presence of the Chern-Simons term, the tensor perturbations are directly affected, and our aim is to reveal the extent of effects of the Chern-Simons term on the gravitational waves modes, for both the axion models. We aim to produce analytical descriptions of the primordial tensor modes behavior, and thus we solve analytically the evolution equations of the tensor modes, for a nearly de Sitter primordial evolution controlled by the R 2 gravity. We focus the analytical study on superhorizon and subhorizon modes. For the misalignment model, we were able to produce analytic solutions for both the subhorizon and superhorizon modes, in which case we found the behavior of the circular polarization function. Our results indicate that the produced tensor spectrum is strongly chiral. For the kinetic axion model though, analytic solutions are obtained only for the superhorizon modes. In order to have a grasp of the behavior of the chirality of the tensor modes, we studied the chirality of the superhorizon modes, however a more complete study is needed, which is impossible to do analytically though.

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Section: Introductionmentioning

confidence: 99%

Chirality of Gravitational Waves in Chern-Simons $f(R)$ Gravity Cosmology

Odintsov,

Oikonomou

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…[58]. The motivation to study such axionic inflationary Lagrangians mainly comes from the fact that the axion, or axionlike particles, are quite appealing candidates for particle dark matter, see [59,60] and also [61][62][63][64][65]. In our opinion, the axion is the last resort of particle dark matter, but the predicted mass is too tiny to be measured in the present day.…”

Section: Introductionmentioning

confidence: 99%

Chirality of gravitational waves in Chern-Simons f(R) gravity cosmology

Odintsov

Oikonomou

2022

Phys. Rev. D

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In this paper we shall consider an axionic Chern-Simons-corrected fðRÞ gravity theoretical framework, and we shall study the chirality of the generated primordial gravitational waves. Particularly, we shall consider two main axion models, the canonical misalignment axion model and the kinetic axion model, both of which provide an interesting particle phenomenology, in the presence of R 2 terms in the inflationary Lagrangian. The axion does not affect significantly the background evolution during the inflationary era, which is solely controlled by R 2 gravity. However, due to the presence of the Chern-Simons term, the tensor perturbations are directly affected, and our aim is to reveal the extent of the effects of the Chern-Simons term on the gravitational wave modes, for both the axion models. We aim to produce analytical descriptions of the primordial tensor mode behavior, and thus we solve analytically the evolution equations of the tensor modes, for a nearly de Sitter primordial evolution controlled by the R 2 gravity. We focus the analytical study on superhorizon and subhorizon modes. For the misalignment model, we were able to produce analytic solutions for both the subhorizon and superhorizon modes, in which case we find the behavior of the circular polarization function. Our results indicate that the produced tensor spectrum is strongly chiral. For the kinetic axion model though, analytic solutions are obtained only for the superhorizon modes. In order to have a grasp of the behavior of the chirality of the tensor modes, we studied the chirality of the superhorizon modes, however, a more complete study is needed, which is impossible to do analytically though.

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“…The additional term is the simplest coupling of a pseudo-scalar field to gravity, that is, the one appears in the CS gravity, which is a low-energy effective theory of parity violating extension of GR [19]. The CS coupling of axions have been searched in [20][21][22][23][24][25][26][27][28][29][30][31][32]. Especially, in the previous study [32], the measurement of the framedragging effect by Gravity Probe B around the Earth constrained the coupling, 10 8 km.…”

Section: Introductionmentioning

confidence: 99%

Observational constraint on axion dark matter with gravitational waves

Tsutsui¹,

Nishizawa²

2022

Preprint

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Most matter in the Universe is invisible and unknown, which is called dark matter. A candidate of dark matter is axion, which is an ultra-light particle motivated as a solution for the CP problem. Axions form clouds in a galactic halo, amplify, and delay a part of gravitational waves propagating in the clouds. The Milky Way is surrounded by the dark matter halo composed of a number of axion patches. Thus, the characteristic secondary gravitational waves are always expected right after the reported gravitational-wave signals from compact binary mergers. In this paper, we derive a realistic amplitude of the secondary gravitational waves. Then we search the gravitational waves having the characteristic time delay and duration with a method optimized for them. We find no significant signal. Assuming the axions are dominant component of dark matter, we obtain the constraints on the axion coupling to the parity violating sector of gravity for the mass range, [1.7 × 10 −13 , 8.5 × 10 −12 ] eV, which is at most ∼ 10 times stronger than that from Gravity Probe B.

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Nonlinear resonant oscillation of gravitational potential induced by ultralight axion in f(R) gravity

Cited by 19 publications

References 50 publications

Chirality of Gravitational Waves in Chern-Simons $f(R)$ Gravity Cosmology

Chirality of Gravitational Waves in Chern-Simons $f(R)$ Gravity Cosmology

Chirality of gravitational waves in Chern-Simons f(R) gravity cosmology

Observational constraint on axion dark matter with gravitational waves

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