Preheating–gravitational-wave correspondence

Bassett, Bruce A.

doi:10.1103/physrevd.56.3439

Cited by 23 publications

(24 citation statements)

References 45 publications

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“…Similar peaks in the gravitational wave spectrum have been seen [24,25] in simulations of undamped preheating. These peaks correspond to the resonant and period doubled frequencies.…”

Section: A Gravitational Wavessupporting

confidence: 59%

Pattern formation in the early universe

Sornborger

Parry

2000

Phys. Rev. D

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Systems that exhibit pattern formation are typically driven and dissipative. In the early universe, parametric resonance can drive explosive particle production called preheating. The fields that are populated then decay quantum mechanically if their particles are unstable. Thus, during preheating, a driven-dissipative system exists. We have shown previously that pattern formation can occur in two dimensions in a self-coupled inflaton system undergoing parametric resonance. In this paper, we provide evidence of pattern formation for more realistic initial conditions in both two and three dimensions. In the one-field case, we have the novel interpretation that these patterns can be thought of as a network of domain walls. We also show that the patterns are spatio-temporal, leading to a distinctive, but probably low-amplitude peak in the gravitational wave spectrum. In the context of a two-field model, we discuss putting power from resonance into patterns on cosmological scales, in particular to explain the observed excess power at 100h −1 Mpc, but why this seems unlikely in the absence of a period of post-preheating inflation. Finally we note our model is similar to that of the decay of DCCs and therefore pattern formation may also occur at RHIC and LHC.

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“…Similar peaks in the gravitational wave spectrum have been seen [24,25] in simulations of undamped preheating. These peaks correspond to the resonant and period doubled frequencies.…”

Section: A Gravitational Wavessupporting

confidence: 59%

Pattern formation in the early universe

Sornborger

Parry

2000

Phys. Rev. D

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“…2). Subsequently we expect the oscillations in χ 0 to produce a secondary resonance due to the self-interaction and non-linearity of Eq's (17,18).…”

Section: B Non-minimal Preheatingmentioning

confidence: 98%

“…It has been shown using the electric and magnetic parts of the Weyl tensor [18] that there exists a formal analogy between the scalar field and graviton cases during resonant reheating. Here we will show that the correspondence also holds in the Bardeen formalism.…”

Section: The Graviton Casementioning

confidence: 99%

See 1 more Smart Citation

Erratum: Geometric reheating after inflation [Phys. Rev. D58, 021302 (1998)]

Bassett¹,

Liberati²

1999

Phys. Rev. D

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Inflationary reheating via resonant production of non-minimally coupled scalar particles with only gravitational coupling is shown to be extremely strong, exhibiting a negative coupling instability for ξ < 0 and a wide resonance decay for ξ ≫ 1. Since non-minimal fields are generic after renormalization in curved spacetime, this offers a new paradigm in reheating -one which naturally allows for efficient production of the massive bosons needed for GUT baryogenesis. We also show that both vector and tensor fields are produced resonantly during reheating, extending the previously known correspondences between bosonic fields of different spin during preheating.

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“…Recently Easther and Lim [14] (see also Ref. [15,16,17]) have suggested that large density inhomogeneities on sub-Hubble scales during preheating at the end of inflation could generate a gravitational wave background that might be detectable by future gravitational wave experiments such as Advanced LIGO [18].…”

Section: Introductionmentioning

confidence: 99%

Cosmological gravitational wave background from primordial density perturbations

2007

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We discuss the gravitational wave background generated by primordial density perturbations evolving during the radiation era. At second-order in a perturbative expansion, density fluctuations produce gravitational waves. We calculate the power spectra of gravitational waves from this mechanism, and show that, in principle, future gravitational wave detectors could be used to constrain the primordial power spectrum on scales vastly different from those currently being probed by large-scale structure. As examples we compute the gravitational wave background generated by both a power-law spectrum on all scales, and a delta-function power spectrum on a single scale.

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Preheating–gravitational-wave correspondence

Cited by 23 publications

References 45 publications

Pattern formation in the early universe

Pattern formation in the early universe

Erratum: Geometric reheating after inflation [Phys. Rev. D58, 021302 (1998)]

Cosmological gravitational wave background from primordial density perturbations

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