Background Gravitational Wave Produced in Inflationary Universe

Nakamura, Shigenari; Yoshino, Noriaki; Kobayashi, S.

doi:10.1143/ptp/88.6.1107

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…The present-day power spectrum is shown in figures 1 and 2. This behaviour is the same as that derived by Nakamura et al [2], where the conformal time η was used.…”

Section: The Power Spectrumsupporting

confidence: 69%

“…It is well known that a non-zero cosmological constant increases the age of the universe, but here we consider the effects on the scale factor, which would change the mode functions of gravitational fields, particularly in the -matter-dominated epoch. This is investigated by calculating the power spectrum of background gravitational waves using two cosmological models; the ordinary model [2,3] and a model with a non-zero cosmological constant, and examining the differences between them. In section 2, we calculate the power spectrum of background gravitational waves in the two cosmological models, and in section 3, we discuss results.…”

Section: Introductionmentioning

confidence: 99%

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The effect of the cosmological constant on background gravitational waves

Hirai

2001

Class. Quantum Grav.

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The effect of a non-zero cosmological constant on the power spectrum of background gravitational waves is investigated. The power spectra of models with and without a non-zero cosmological constant are compared, and measurable differences between the models are identified. In particular, the power spectrum for non-zero cosmological constant is 0.3–0.6 times lower than the models with a zero constant for large-scale gravitational waves, yet identical at the super-horizon scale.

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“…The present-day power spectrum is shown in figures 1 and 2. This behaviour is the same as that derived by Nakamura et al [2], where the conformal time η was used.…”

Section: The Power Spectrumsupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

The effect of the cosmological constant on background gravitational waves

Hirai

2001

Class. Quantum Grav.

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Oscillatory amplitude of stochastic gravitational wave spectrum

Malsawmtluangi

Suresh

2022

Indian J Phys

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Graviton creation in an expanding universe

Moorhouse

Henriques²,

Mendes³

1994

Phys. Rev. D

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Dicke type scalars such as extended inflation. OCR Output perturbations is given explicitly. The method is also applicable to theories with Brans gravitational wave production through amplitude amplification for classical metric coefficients can alternatively be used, the two results agree. The relation to the result for between cosmic eras can be treated as sudden, so that the well known discrete Bogoliubov which is an arbitrary function of time; in those particular cases where the transitions production is applicable for any wavelengths and for a Friedmann universe scale factor coefficients, defined as continuous functions of time. The resulting method for graviton In graviton creation a new derivation is given of a differential equation for Bogoliubov Abstract

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Background Gravitational Wave Produced in Inflationary Universe

Cited by 4 publications

References 2 publications

The effect of the cosmological constant on background gravitational waves

The effect of the cosmological constant on background gravitational waves

Oscillatory amplitude of stochastic gravitational wave spectrum

Graviton creation in an expanding universe

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