Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Kawaguchi, Ryodai"'
Publikováno v:
JHEP12(2024)095
We revisit one-loop corrections to the power spectrum of curvature perturbations $\zeta$ in an inflationary scenario containing a transient ultra-slow-roll (USR) period. In Ref.[1], it was argued that one-loop corrections to the power spectrum of $\z
Externí odkaz:
http://arxiv.org/abs/2407.19742
Publikováno v:
Phys. Lett. B 856 (2024) 138962
We revisit the properties of total time-derivative terms as well as terms proportional to the free equation of motion (EOM) in a Schwinger-Keldysh formalism. They are relevant to the correct calculation of correlation functions of curvature perturbat
Externí odkaz:
http://arxiv.org/abs/2403.16022
Publikováno v:
Phys. Rev. D 108, 123524 (2023)
In Starobinsky inflation with a Weyl squared Lagrangian $-\alpha C^2$, where $\alpha$ is a coupling constant, we study the linear stability of cosmological perturbations on a spatially flat Friedmann-Lema\^{i}tre-Robertson-Walker background. In this
Externí odkaz:
http://arxiv.org/abs/2309.01835
Publikováno v:
JCAP11(2023)021
We study a single-field inflation model in which the inflaton potential has an upward step between two slow-roll regimes by taking into account the finite width of the step. We calculate the probability distribution function (PDF) of the curvature pe
Externí odkaz:
http://arxiv.org/abs/2305.18140
Autor:
Kawaguchi, Ryodai, Tsujikawa, Shinji
Publikováno v:
Phys. Rev. D 107, 063508 (2023)
Primordial black holes (PBHs) can be the source for all or a part of today's dark matter density. Inflation provides a mechanism for generating the seeds of PBHs in the presence of a temporal period where the velocity of an inflaton field $\phi$ rapi
Externí odkaz:
http://arxiv.org/abs/2211.13364
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