Complete power spectrum for an induced gravity open inflation model
نویسندگان
چکیده
منابع مشابه
Induced-gravity Inflation and the Density Perturbation Spectrum
Recent experimental determinations of the spectral index describing the scalar mode spectrum of density perturbations encourage comparison with predictions from models of the very early universe. Unlike extended inflation, Induced-gravity Inflation predicts a power spectrum with 0.98 ≤ ns ≤ 1.00, in close agreement with the experimental measurements. PACS numbers: 98.80C, 04.50 An exciting test...
متن کاملInduced-gravity inflation and the density perturbation spectrum
Recent experimental determinations of the spectral index describing the scalar mode spectrum of density perturbations encourage comparison with predictions from models of the very early universe. Unhke extended inflation, Induced-gravity Inflation predicts a power spectrum with 0.98 _< ns _< 1.00, in close agreement with the experimental measurements. An exciting test for models of the very ear...
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The open inflation model recently proposed by Hawking and Turok is investigated in scalar-tensor gravity context. If the dilaton-like field has no potential, the instanton of our model is singular but has a finite action. The GibbonsHawking surface term vanishes and hence, can not be used to make Ω0 nonzero. To obtain a successful open inflation one should introduce other matter fields or a pot...
متن کاملOpen Inflation With The Scalar-tensor Gravity
The open inflation model recently proposed by Hawking and Turok is investigated in the scalar-tensor gravity context. If the dilaton-like field has no potential, the instanton of our model is singular but has a finite action. The Gibbons-Hawking surface term vanishes and hence, can not be used to make Ω be nonzero. Introducing four-form fields, we can obtain the desired Ω value with fine tuning...
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In the present letter we find that Starobinsky’s inflationary solution is also valid in the Dvali-Gabadadze-Porrati (DGP) model where a 3-brane is embedded in 5dimensional Minkowski bulk. We show that such a solution is typically not supported by the Self-Accelerated branch of the model, giving therefore a natural selection of the conventional branch of solutions. In the absence of brane induce...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1997
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.55.4603