Beta-function formalism for k-essence constant-roll inflation
Sign Up to like & getrecommendations! Published in 2020 at "Physics of the Dark Universe"
DOI: 10.1016/j.dark.2020.100505
Abstract: The beta function formalism is being used to study the constant-roll inflation in the k-essence model. Assuming the second slow-roll parameter as a constant leads to a first-order differential equation for $\beta$-function which is much… read more here.
Keywords: roll; constant roll; beta function; roll inflation ... See more keywords
Systematics of constant roll inflation
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2018/02/004
Abstract: We study constant roll inflation systematically. This is a regime, in which the slow roll approximation can be violated. It has long been thought that this approximation is necessary for agreement with observations. However, recently… read more here.
Keywords: roll; systematics constant; constant roll; systematics ... See more keywords
Constant-roll inflation in f(T) teleparallel gravity
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2018/07/026
Abstract: We investigate in detail the implications of the constant-roll condition on the inflationary era of a scalar field coupled to a teleparallel $f(T)$ gravity. The resulting cosmological equations constitute a reconstruction technique which enables us… read more here.
Keywords: inflation teleparallel; constant roll; teleparallel gravity; gravity ... See more keywords
Inflation with a smooth constant-roll to constant-roll era transition
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review D"
DOI: 10.1103/physrevd.96.024029
Abstract: In this paper we study canonical scalar field models with a varying second slow-roll parameter, that allow transitions between constant-roll eras. In the models with two constant-roll eras it is possible to avoid fine-tunings in… read more here.
Keywords: roll; constant roll; roll era; roll eras ... See more keywords
Tachyon constant-roll inflation
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review D"
DOI: 10.1103/physrevd.97.083006
Abstract: The constant-roll inflation is studied where the inflaton is taken as a tachyon field. Based on this approach, the second slow-roll parameter is taken as a constant which leads to a differential equation for the… read more here.
Keywords: hubble parameter; roll; constant roll; parameter ... See more keywords
On the Constant-Roll Tachyon Inflation with Large and Small ηH
Sign Up to like & getrecommendations! Published in 2022 at "Symmetry"
DOI: 10.3390/sym14122670
Abstract: We study the constant-roll tachyon inflation with large and small η. In previous studies, only the constant-roll tachyon inflation with small η is consistent with the observations. We find that the duality between the constant-roll… read more here.
Keywords: constant roll; tachyon inflation; roll tachyon;
Palatini f(R) Gravity and Variants of k-/Constant Roll/Warm Inflation within Variation of Strong Coupling Scenario
Sign Up to like & getrecommendations! Published in 2022 at "Universe"
DOI: 10.3390/universe8020126
Abstract: We show that upon applying Palatini f(R), characterized by an αR2 term, within a scenario motivated by a temporal variation of strong coupling constant, then one obtains a quadratic kinetic energy. We do not drop… read more here.
Keywords: constant roll; strong coupling; gravity; variation strong ... See more keywords