Cosmological perturbations in a generalized gravity including tachyonic condensation

Abstract

We present unified ways of handling the cosmological perturbations in a class of gravity theory covered by a general action in eq. (1). This gravity includes our previous generalized $f(\varphi ,R)$ gravity and the gravity theory motivated by the tachyonic condensation. We present general prescription to derive the power spectra generated from vacuum quantum fluctuations in the slow-roll inflation era. An application is made to a slow-roll inflation based on the tachyonic condensation with an exponential potential.

5 pages

References in corpus (1)

• Cosmological Constraints on Tachyon Matter

Cited by in corpus (115)

• Dynamics of dark energy
• Modified Gravity Theories on a Nutshell: Inflation, Bounce and Late-time Evolution
• Cosmological Dynamics of Phantom Field
• Observational signatures of f(R) dark energy models that satisfy cosmological and local gravity constraints
• Primordial non-gaussianities in single field inflation
• Matter density perturbations and effective gravitational constant in modified gravity models of dark energy
• Classical evolution and quantum generation in generalized gravity theories including string corrections and tachyon: Unified analyses
• What is needed of a tachyon if it is to be the dark energy?
• Coupled dark energy: Towards a general description of the dynamics
• Cosmological perturbations in the Palatini formulation of modified gravity
• On the Construction of Nonsingular Pre-Big-Bang and Ekpyrotic Cosmologies and the Resulting Density Perturbations
• Assisted Tachyonic Inflation
• Inflationary non-Gaussianities in the most general second-order scalar-tensor theories
• Tracking solutions in tachyon cosmology
• Viable Inflation in Scalar-Gauss-Bonnet Gravity and Reconstruction from Observational Indices
• Density perturbations in general modified gravitational theories
• Tachyon inflation: tests and comparison with single scalar field inflation
• Reheating from Tachyon Condensation
• Parametric amplification of metric fluctuations through a bouncing phase
• Finite-time Cosmological Singularities and the Possible Fate of the Universe
• Rolling Tachyon with Electric and Magnetic Fields -- T-duality approach -----
• Slow-roll parameters in braneworld cosmologies
• General analytic formulae for attractor solutions of scalar-field dark energy models and their multi-field generalizations
• Primordial Non-Gaussianities of General Multiple Field Inflation
• Cosmology from Rolling Massive Scalar Field on the anti-D3 Brane of de Sitter Vacua
• A Viable Cosmology with a Scalar Field Coupled to the Trace of the Stress-Tensor
• SD-brane gravity fields and rolling tachyons
• Inflationary Phenomenology of Einstein Gauss-Bonnet Gravity Compatible with GW170817
• Extended matter bounce scenario in ghost free $f(R,\mathcal{G})$ gravity compatible with GW170817
• A Note on Inflation with Tachyon Rolling on the Gauss-Bonnet Brane
• Logarithmic-corrected $R^2$ Gravity Inflation in the Presence of Kalb-Ramond Fields
• Inflation and dark energy arising from geometrical tachyons
• Tachyon Field in Intermediate Inflation
• Tachyon Kinks
• From a Bounce to the Dark Energy Era with $F(R)$ Gravity
• Intermediate-Generalized Chaplygin Gas inflationary universe model
• Constant-roll tachyon inflation and observational constraints
• $k$-essence $f(R)$ Gravity Inflation
• Cosmological perturbations in Palatini modified gravity
• Intermediate inflation from a non-canonical scalar field
• Non-minimally Coupled Tachyonic Inflation in Warped String Background
• Electromagnetic String Fluid in Rolling Tachyon
• Caustic Formation in Tachyon Effective Field Theories
• Warm Anisotropic Inflationary Universe Model
• Aspects of Scalar Field Dynamics in Gauss-Bonnet Brane Worlds
• Curvaton reheating in tachyonic inflationary models
• Constraints on Dirac-Born-Infeld type dark energy models from varying alpha
• Non-singular Bounce Cosmology from Lagrange Multiplier $F(R)$ Gravity
• A new perspective on the relation between dark energy perturbations and the late-time ISW effect
• Tachyon-Chaplygin inflationary universe model
• IR Inflation from Multiple Branes
• Constant-roll in the Palatini-$R^2$ models
• Third order perturbations of a zero-pressure cosmological medium: Pure general relativistic nonlinear effects
• Inflation from Geometrical Tachyons
• Hamilton-Jacobi Formalism for Tachyon Inflation
• A Study of an Einstein Gauss-Bonnet Quintessential Inflationary Model
• Tachyonic Inflation in a Warped String Background
• Constant-roll $k$-Inflation Dynamics
• Non-Gaussianities of Single Field Inflation with Non-minimal Coupling
• Off-shell extension of S-matrix elements and tachyonic effective actions
• On the dangers of using the growth equation on large scales in the Newtonian gauge
• General Slow-Roll Spectrum for Gravitational Waves
• The reconstruction of tachyon inflationary potentials
• Inflation from D3-brane motion in the background of D5-branes
• Dynamical back-reaction of relic gravitons
• On the phantom barrier crossing and the bounds on the speed of sound in non-minimal derivative coupling theories
• DBI N-flation
• Constraining $F(R)$ bouncing cosmologies with primordial black holes
• Tachyon Field in Intermediate Inflation on the Brane
• Anisotropic singularities in modified gravity models
• Observational signatures of a non-singular bouncing cosmology
• S-matrix elements and off-shell tachyon action with non-abelian gauge symmetry
• Tachyon-Chaplygin inflation on the brane
• Exact theory for the Rezzolla-Zhidenko metric and self-consistent calculation of quasinormal modes
• Brans-Dicke inflation in light of the Planck 2015 data
• Observational constraints on assisted k-inflation
• Gauss-Bonnet Dark Energy and the Speed of Gravitational Waves
• Constant-Roll Inflation in modified $f(R,\varphi )$ gravity model using Palatini Formalism
• Vanishing Cosmological Constant in Modified Gauss-Bonnet Gravity with Conformal Anomaly
• Tachyon warm inflationary universe model in the weak dissipative regime
• Tachyon inflation in the holographic braneworld
• A note on Low Energy Effective Theory of Chromo Natural Inflation in the light of BICEP2 results
• Dynamics of Rolling Massive Scalar Field Cosmology
• Constraints on tachyon inflationary models with an AdS/CFT correspondence
• Viable non-singular cosmic bounce in holonomy improved F(R) gravity endowed with a Lagrange multiplier
• Approach to exact solutions of cosmological perturbations: Tachyon field inflation
• Logamediate Inflation by Tachyon Field
• A Quintessentially Geometric Model
• Constraint on reconstructed f(R) gravity models from gravitational waves
• Alternative approach to the Starobinsky model for inflation scenarios
• A family of solutions to the inverse problem in gravitation: building a theory around a metric
• Rejuvenating the hope of a swampland consistent inflated multiverse with tachyonic inflation in the high energy RS-II Braneworld
• Holographic cosmology and tachyon inflation
• Quantization of perturbations during inflation in the 1+3 covariant formalism
• Inflationary Weak Anisotropic Model with General Dissipation Coefficient
• Dark energy with a shift-symmetric scalar field: obstacles, loophole hunting and dead ends
• Reconstruction of f(R) gravity models from observations
• Tachyon Logamediate inflation on the brane
• Primordial perturbations and inflation in holographic cosmology
• De Sitter cosmology from Gauss-Bonnet dark energy with quantum effects
• Quantum initial conditions for curved inflating universes
• Tachyon field non-minimally coupled to massive neutrino matter
• A study on causality in $f(R,\varphi ,X)$ theory
• Bouncing cosmologies in geometries with positively curved spatial sections
• Cosmology in a model with Lagrange multiplier, and Gauss-Bonnet and non-minimal kinetic couplings
• (1+1)-Dirac bound states in one-dimension; position-dependent Fermi velocity and mass
• Primordial perturbations and inflation in a holography inspired Gauss-Bonnet cosmology
• Constant-roll inflation with tachyon field in the holographic braneworld
• Logamediate inflation in DGP cosmology driven by a non-canonical scalar field
• Tachyonic Universes in Patch Cosmologies with $\Omega >1$
• D-brane anti-D-brane effective action and brane interaction in open string channel
• Constraining tachyonic inflationary β-exponential model with Continuous Spontaneous Localization collapse scheme
• Unified dynamical system formulations for $f(R,\varphi ,X)$ gravity with applications to nonminimal derivative coupling and $R^2$-Higgs inflation
• General perturbations in D+1 standard and brane cosmology revisited
• Non-canonical scalar field in low anisotropy universe with intermediate inflation