2008
DOI: 10.1103/physrevd.78.063541
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Stochastic backgrounds of gravitational waves from cosmological sources: Techniques and applications to preheating

Abstract: Several mechanisms exist for generating a stochastic background of gravitational waves in the period following inflation. These mechanisms are generally classical in nature, with the gravitational waves being produced from inhomogeneities in the fields that populate the early universe and not quantum fluctuations. The resulting stochastic background could be accessible to next generation gravitational wave detectors. We develop a framework for computing such a background analytically and computationally. As an… Show more

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Cited by 30 publications
(34 citation statements)
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“…(2.26) we obtain the following frequencies today f p = κ p × 6 · 10 6 Hz . These amplitudes are in perfect agreement with the background amplitudes computed in the past for this scenario in the case g 2 /λ = 120, where it was obtained [45,47,65,66] h 2 Ω GW ∼ 10 −11 at the peak amplitude 9 . Even though our analytical prediction in Eq.…”
Section: Gravitational Wave Parametrizationsupporting
confidence: 90%
“…(2.26) we obtain the following frequencies today f p = κ p × 6 · 10 6 Hz . These amplitudes are in perfect agreement with the background amplitudes computed in the past for this scenario in the case g 2 /λ = 120, where it was obtained [45,47,65,66] h 2 Ω GW ∼ 10 −11 at the peak amplitude 9 . Even though our analytical prediction in Eq.…”
Section: Gravitational Wave Parametrizationsupporting
confidence: 90%
“…Moreover, these same models leave us with few observational signatures. It is likely that the only observable consequence is in the form of a stochastic gravitational wave background [13,[22][23][24][25][26][27][28][29] whose signal will be very difficult to detect unless inflation occurred at a very low scale.…”
Section: Introductionmentioning
confidence: 99%
“…Since the structure of preheating is so similar, one can additionally expect that the gravitational wave spectrum from preheating [35][36][37][38][39][40][41][42][43] as well as any other observable consequences, e.g., non-Gaussianities [44][45][46][47][48][49], should not be any less significant, although we leave these analyses for other work. We also delay a discussion of how self-resonance effects are important when considering the generation of pseudostable, nonlinear structures in the inflaton field [50,51].…”
mentioning
confidence: 99%