Zobrazeno 1 - 10
of 300
pro vyhledávání: '"curvature: perturbation"'
Publikováno v:
Physics Letters B, Vol 827, Iss , Pp 136956- (2022)
We develop a nonperturbative method through the Hartree factorization to examine the quantum fluctuation effects on the single-field inflationary models in a spatially flat FRW cosmological space-time. Apart from the background field equation as well
Externí odkaz:
https://doaj.org/article/6daa8a94d803457da586394736c926d0
Autor:
Tanmoy Paul
Publikováno v:
Symmetry, Vol 14, Iss 6, p 1086 (2022)
In the present work, we examine the following points in the context of curvature coupling helical magnetogenesis scenario where the electromagnetic field couples with the background Ricci scalar as well as with the background Gauss-Bonnet cuvature te
Externí odkaz:
https://doaj.org/article/6cd380efd0a34e6a93c16b0757601d1d
Akademický článek
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Publikováno v:
European Physical Journal C: Particles and Fields, Vol 77, Iss 4, Pp 1-9 (2017)
Abstract Recent analysis of the WMAP and Planck data have shown the presence of a dip and a bump in the spectrum of primordial perturbations at the scales $$k=0.002$$ k = 0.002 Mpc $${}^{-1}$$ - 1 and $$k=0.0035$$ k = 0.0035 Mpc $${}^{-1}$$ - 1 , res
Externí odkaz:
https://doaj.org/article/3180c6d4548b4b499fd0d5ffa1cbcce9
Autor:
Guillermo Ballesteros, Marcos A.G. García, Alejandro Pérez Rodríguez, Mathias Pierre, Julián Rey
Publikováno v:
Journal of cosmology and astroparticle physics 12(12), 006 (2022). doi:10.1088/1475-7516/2022/12/006
Journal of cosmology and astroparticle physics 12(12), 006 (2022). doi:10.1088/1475-7516/2022/12/006
We study the generation of a localized peak in the primordial spectrum of curvature perturbations from a transient dissipative phase during infl
We study the generation of a localized peak in the primordial spectrum of curvature perturbations from a transient dissipative phase during infl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c47411b71dbe2540dfbe2584f09bc3f0
http://arxiv.org/abs/2208.14978
http://arxiv.org/abs/2208.14978
Autor:
Yi-Peng Wu, Kin-Wang Ng
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 11, Pp 1-26 (2021)
JHEP
JHEP, 2021, 11, pp.076. ⟨10.1007/JHEP11(2021)076⟩
Journal of High Energy Physics
JHEP
JHEP, 2021, 11, pp.076. ⟨10.1007/JHEP11(2021)076⟩
Journal of High Energy Physics
Constant-rate inflation, including ultra-slow-roll as a special case, has been widely applied to the formation of primordial black holes with significant deviation from the standard slow-roll conditions at both the growing and decaying phases of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4ddfe4482a5338fd96d8d1b58d9a41d
https://doaj.org/article/9a34b2f2ba4642b1a89dd615ea89ceeb
https://doaj.org/article/9a34b2f2ba4642b1a89dd615ea89ceeb
Akademický článek
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Autor:
Setare Mohammad, Kamali Vahid
Publikováno v:
Open Physics, Vol 11, Iss 5, Pp 545-552 (2013)
Externí odkaz:
https://doaj.org/article/e0c6fddc78f344ff960b72a8de7eaa0e
Publikováno v:
Journal of High Energy Physics
We derive a set of no-go theorems and yes-go examples for the parity-odd primordial trispectrum of curvature perturbations. We work at tree-level in the decoupling limit of the Effective Field Theory of Inflation and assume scale invariance and a Bun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f0779f047c2cf3da8ce4d29080df9f4
https://hal.science/hal-03823010
https://hal.science/hal-03823010
Autor:
Ballesteros, Guillermo, García, Marcos A. G., Rodríguez, Alejandro Pérez, Pierre, Mathias, Rey, Julián
We study the generation of a localized peak in the primordial spectrum of curvature perturbations from a transient dissipative phase during inflation, leading to a large population of primordial black holes. The enhancement of the power spectrum occu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::372392379078a911a02285660e1d8687