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Volumn 55, Issue 2, 1997, Pages R435-R439

Detectability of inflation-produced gravitational waves

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[No Author keywords available]

Indexed keywords


EID: 0001306103     PISSN: 15507998     EISSN: 15502368     Source Type: Journal    
DOI: 10.1103/PhysRevD.55.R435     Document Type: Article
Times cited : (243)

References (45)
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    • One opinion has it that inflation-produced gravity waves are undetectably small in any reasonable model of inflation [D. Lyth, Report No. hep-ph/9606387 (unpublished)]
    • One opinion has it that inflation-produced gravity waves are undetectably small in any reasonable model of inflation [D. Lyth, Report No. hep-ph/9606387 (unpublished)].
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    • All formulas are given to lowest order in the deviation from scale invariance and are strictly applicable to single-field models with smooth potentials; see A. R. Liddle and M. S. Turner, Phys. Rev. D50, 758 (1994).
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    • In addition, they assume (Formula presented)=1; the formulas for (Formula presented)≠1 are given in M. S. Turner and M. White, Phys. Rev. D53, 6822 (1996).
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    • Turner, M.S.1    White, M.2
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    • Isotropy in the mean implies that (Formula presented); the Gaussian nature of the inflationary metric fluctuations implies that the multipole amplitudes have Gaussian distributions, fully specified by their predicted variances
    • Isotropy in the mean implies that (Formula presented); the Gaussian nature of the inflationary metric fluctuations implies that the multipole amplitudes have Gaussian distributions, fully specified by their predicted variances.
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    • The energy density in gravitational waves can be expressed in terms of a rms strain, (Formula presented): (Formula presented). Note, for fixed strain sensitivity, the energy-density sensitivity varies with the square of the frequency
    • The energy density in gravitational waves can be expressed in terms of a rms strain, (Formula presented): (Formula presented). Note, for fixed strain sensitivity, the energy-density sensitivity varies with the square of the frequency.
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    • This is simple to understand: the drop in energy density from the Hubble scale to the plateau is given by the redshift of matter—radiation equality, which is inversely proportional to the energy density in radiation
    • This is simple to understand: the drop in energy density from the Hubble scale to the plateau is given by the redshift of matter—radiation equality, which is inversely proportional to the energy density in radiation.
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    • Given the inflationary potential the gravity-wave spectrum can be computed without assuming a power law; we have done this for chaotic inflation models, (Formula presented), to judge the accuracy of our approximation. It is typically better than 33%. In addition, since there is no standard model of inflation, the use of (Formula presented) and (Formula presented) to extrapolate the gravity-wave spectrum from very large scales offers the advantage of generality
    • Given the inflationary potential the gravity-wave spectrum can be computed without assuming a power law; we have done this for chaotic inflation models, (Formula presented), to judge the accuracy of our approximation. It is typically better than 33%. In addition, since there is no standard model of inflation, the use of (Formula presented) and (Formula presented) to extrapolate the gravity-wave spectrum from very large scales offers the advantage of generality.
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.