Viable Mimetic Completion of Unified Inflation-Dark Energy Evolution in Modified Gravity

Abstract

In this paper, we demonstrate that a unified description of early and late-time acceleration is possible in the context of mimetic $F(R)$ gravity. We study the inflationary era in detail and demonstrate that it can be realized even in mimetic $F(R)$ gravity where traditional $F(R)$ gravity fails to describe the inflation. By using standard methods we calculated the spectral index of primordial curvature perturbations and the scalar-to-tensor ratio. We use two $F(R)$ gravity models and as it turns out, for both the models under study the observational indices are compatible with both the latest Planck and the BICEP2/Keck array data. Finally, the graceful exit from inflation is guaranteed by the existence of growing curvature perturbations when the slow-roll era ends.

arXiv commentPRD Accepted

References in corpus (42)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• Introduction to Modified Gravity and Gravitational Alternative for Dark Energy
• Modified gravity with negative and positive powers of the curvature: unification of the inflation and of the cosmic acceleration
• Models of f(R) Cosmic Acceleration that Evade Solar-System Tests
• Chameleon Cosmology
• Planck 2013 results. XXII. Constraints on inflation
• Class of viable modified $f(R)$ gravities describing inflation and the onset of accelerated expansion
• Can modified gravity explain accelerated cosmic expansion?
• BICEP2 / Keck Array VI: Improved Constraints On Cosmology and Foregrounds When Adding 95 GHz Data From Keck Array
• Unifying inflation with LambdaCDM epoch in modified f(R) gravity consistent with Solar System tests
• Do consistent $F(R)$ models mimic General Relativity plus $\Lambda$?
• Modified f(R) gravity unifying R^m inflation with \LambdaCDM epoch
• Mimetic Dark Matter
• Black holes, cosmological solutions, future singularities, and their thermodynamical properties in modified gravity theories
• Cosmology with Mimetic Matter
• Exponential Gravity
• Dust of Dark Energy
• Inflation in $f(R,\varphi )$-theories and mimetic gravity scenario
• Mimetic $F(R)$ gravity: inflation, dark energy and bounce
• On the recently proposed Mimetic Dark Matter
• Static spherically symmetric solutions in mimetic gravity: rotation curves & wormholes
• f(R) gravity theory and CMBR constraints
• Dark energy from modified gravity with Lagrange multipliers
• Cosmological evolution in exponential gravity
• A bird's eye view of f(R)-gravity
• Dynamical behavior in mimetic F(R) gravity
• Gauge-ready formulation of the cosmological kinetic theory in generalized gravity theories
• Covariant Horava-like and mimetic Horndeski gravity: cosmological solutions and perturbations
• Modified Gauss-Bonnet gravity with Lagrange multiplier constraint as mimetic theory
• Inflationary spectra in generalized gravity: Unified forms
• Accelerating Cosmology and Phase Structure of F(R) Gravity with Lagrange Multiplier Constraint: Mimetic Approach
• Trace-anomaly driven inflation in modified gravity and the BICEP2 result
• Cosmological perturbations in mimetic matter model
• New Modified Mimetic Gravity
• Unveiling the Dynamics of the Universe
• Oscillations of the F(R) dark energy in the accelerating universe
• Unimodular Mimetic $F(R)$ Inflation
• An Exponential F(R) Dark Energy Model
• Dark Energy and Equation of State Oscillations with Collisional Matter Fluid in Exponential Modified Gravity
• Many Faces of Mimetic Gravity
• Mimetic Attractors

Cited by in corpus (52)

• Modified Gravity Theories on a Nutshell: Inflation, Bounce and Late-time Evolution
• Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A${}^{\ast }$
• Unification of Constant-roll Inflation and Dark Energy with Logarithmic $R^2$-corrected and Exponential $F(R)$ Gravity
• Unification of Inflation with Dark Energy in $f(R)$ Gravity and Axion Dark Matter
• Cosmological dynamics of mimetic gravity
• Alive and well: mimetic gravity and a higher-order extension in light of GW170817
• Mimicking dark matter and dark energy in a mimetic model compatible with GW170817
• Constant-roll Inflation in $F(R)$ Gravity
• Recovering a MOND-like acceleration law in mimetic gravity
• On (in)stabilities of perturbations in mimetic models with higher derivatives
• The Reconstruction of $f(\varphi )R$ and Mimetic Gravity from Viable Slow-roll Inflation
• Ghost-Free $F(R)$ Gravity with Lagrange Multiplier Constraint
• Higher Derivative Mimetic Gravity
• Late time cosmological approach in mimetic $f(R,T)$ gravity
• Braneworld Mimetic Cosmology
• Inflation in mimetic f(G) gravity
• $F(R)$ Gravity with an Axion-like Particle: Dynamics, Gravity Waves, Late and Early-time Phenomenology
• Evaluation of cosmological models in $f(R,T)$ gravity in different dark energy scenario
• Thick branes with inner structure in mimetic $f(R)$ gravity
• Cosmic evolution of the logarithmic f(R) model and the dS swampland conjecture
• Imprints of interacting dark energy on cosmological perturbations
• Gravitational resonances in mimetic thick branes
• Two-field mimetic gravity revisited and Hamiltonian analysis
• Inflation in mimetic $f(R,T)$ gravity
• Scalar Field Assisted $f(R)$ Gravity Inflation
• Consistency between black hole and mimetic gravity -- Case of $(2+1)$-dimensional gravity
• Mimetic Black Strings
• Mimetic gravity in $(2+1)$-dimensions
• Mimetic Inflation
• New anisotropic star solutions in mimetic gravity
• Further Refining Swampland dS Conjecture in Mimetic f(G) Gravity
• Topological black holes in mimetic gravity
• Structure formation in mimetic gravity
• Mimetic DBI Inflation in Confrontation with Planck2018 data
• Reconstructing Mimetic Cosmology
• Direct couplings of mimetic dark matter and their cosmological effects
• Hamiltonian analysis of Mimetic gravity with higher derivatives
• Emergent scenario in mimetic gravity
• Black holes with Lagrange multiplier and potential in mimetic-like gravitational theory: multi-horizon black holes
• Multi-field Mimetic Gravity
• Tachyon Mimetic Inflation as an Instabilities-Free Model
• Mimetic-Metric-Torsion with induced Axial mode and Phantom barrier crossing
• Cosmological Dark sector from a Mimetic-Metric-Torsion perspective
• Isotropic stellar model in mimetic theory
• Extensions of two-field mimetic gravity
• From inflation to dark energy in scalar-tensor cosmology
• Mimetic Weyl geometric gravity
• Holographic description of unified early and late universe in viscous mimetic gravity
• Matter production effects and interacting scenario within a reconstructed mimetic cosmology for late times
• Viable Intermediate Inflation in the Mimetic DBI Model
• Dual models for p-form mimetic gravity and their connection to perfect fluids consisting of (p+1)-branes
• First-order formalism and thick branes in mimetic gravity