Curvaton with nonminimal derivative coupling to gravity

Abstract

We show a curvaton model, in which the curvaton has a nonminimal derivative coupling to gravity. Thanks to such a coupling, we find that the scale-invariance of the perturbations can be achieved for arbitrary values of the equation-of-state of background, provided that it is nearly a constant. We also discussed about tensor perturbations, the local non-Gaussianities generated by the nonminimal derivative coupling curvaton model, as well as the adiabatic perturbations which are transferred from the field perturbations during the curvaton decay.

11 pages

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Cited by in corpus (31)

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• Cosmological models in modified gravity theories with extended nonminimal derivative couplings
• Higher order derivative coupling to gravity and its cosmological implications
• Thermodynamics of scalar-tensor theory with non-minimally derivative coupling
• Topological black hole in the theory with nonminimal derivative coupling with power-law Maxwell field and its thermodynamics
• Alleviating $H_0$ tension in Horndeski gravity
• Curvaton with Nonminimal Derivative Coupling to Gravity II: Full Perturbation Analysis
• The slow expansion with nonminimal derivative coupling and its conformal dual
• Oscillating modulation to B-mode polarization from varying propagating speed of primordial gravitational waves
• PPN parameters in gravitational theory with nonminimally derivative coupling
• Non-minimally coupled curvaton
• Dynamical evolution of a vector field perturbation coupling to Einstein tensor
• Temperature in warm inflation in non minimal kinetic coupling model
• New DBI Inflation model with Kinetic Coupling to Einstein Gravity
• Curvaton reheating in a Scale Invariant Two Measures Theory
• Warm inflation with an oscillatory inflaton in the non-minimal kinetic coupling model
• Gravitational waves induced by spinor fields
• Oscillation in power spectrum of primordial gravitational wave as a signature of higher-order stringy corrections
• Reheating mechanism of Curvaton with Nonminimal Derivative Coupling to Gravity
• Thermodynamics of general scalar-tensor theory with non-minimally derivative coupling
• Interpreting Pulsar Timing Array data of Gravitational Waves with Ekpyrosis-Bouncing Cosmology
• Potential-driven Inflation with Disformal Coupling to Gravity
• Curvaton reheating in non-minimal derivative coupling to gravity: NO models
• Entropic mechanisms with generalized scalar fields in the Ekpyrotic universe
• Static topological black hole with nonminimal derivative coupling and nonlinear electromagnetic field of Born-Infeld type
• Implications of the primordial anisotropy for a scalar field with non-minimal kinetic coupling
• Derivative coupling of inflaton to $R^{(3)}$
• Non-minimal kinetic coupled gravity: inflation on the Warped DGP brane