Bounce cosmology in generalized modified gravities
arXiv:1902.06558 · doi:10.3390/universe5030074
Abstract
We investigate the bounce realization in the framework of generalized modified gravities arising from Finsler and Finsler-like geometries. In particular, the richer intrinsic geometrical structure is reflected in the appearance of extra degrees of freedom in the Friedmann equations that can drive the bounce. We examine various Finsler and Finsler-like constructions. In the cases of general very special relativity as well as of Finsler-like gravity on the tangent bundle we show that a bounce cannot be easily obtained. However, in the Finsler-Randers space the induced scalar anisotropy can fulfill the bounce conditions and bouncing solutions are easily obtained. Finally, for the general class of theories that include a nonlinear connection a new scalar field is induced, leading to a scalar-tensor structure that can easily drive a bounce. These features reveal the capabilities of Finsler and Finsler-like geometries.
10 pages, 3 figures, to appear in Universe
References in corpus (55)
- The Confrontation between General Relativity and Experiment
- The Ekpyrotic Universe: Colliding Branes and the Origin of the Hot Big Bang
- Analogue Gravity
- Absence of Singularity in Loop Quantum Cosmology
- From Big Crunch to Big Bang
- Bouncing Universes in String-inspired Gravity
- Matter Bounce Cosmology with the f(T) Gravity
- Towards a Nonsingular Bouncing Cosmology
- Bouncing Cosmologies: Progress and Problems
- Very Special Relativity
- Matter Bounce in Horava-Lifshitz Cosmology
- G-Bounce
- Bouncing Universe with Quintom Matter
- General Very Special Relativity is Finsler Geometry
- Bouncing Braneworlds
- Bounce cosmology from gravity and bigravity
- Conditions for the cosmological viability of the most general scalar-tensor theories and their applications to extended Galileon dark energy models
- Exploring Bouncing Cosmologies with Cosmological Surveys
- A Nonsingular Cosmology with a Scale-Invariant Spectrum of Cosmological Perturbations from Lee-Wick Theory
- Mimetic gravity: inflation, dark energy and bounce
- Finsler geometric extension of Einstein gravity
- Anisotropic Dark Energy: Dynamics of Background and Perturbations
- The General Very Special Relativity in Finsler Cosmology
- Non-singular cosmology in a model of non-relativistic gravity
- Horava-Lifshitz Dark Energy
- Bouncing Cosmology made simple
- Matter Bounce Loop Quantum Cosmology from Gravity
- Towards Anisotropy-Free and Non-Singular Bounce Cosmology with Scale-invariant Perturbations
- Resembling dark energy and modified gravity with Finsler-Randers cosmology
- Perturbations in a non-singular bouncing Universe
- Principles of Einstein-Finsler Gravity and Perspectives in Modern Cosmology
- Friedmann Robertson-Walker model in generalised metric space-time with weak anisotropy
- Finsler gravity action from variational completion
- Bounce and cyclic cosmology in extended nonlinear massive gravity
- Repulsive gravity in the very early Universe
- Cosmological perturbations across a curvature bounce
- Implications of a Stochastic Microscopic Finsler Cosmology
- Modified Dispersion Relations in Horava-Lifshitz Gravity and Finsler Brane Models
- Evolution of curvature and anisotropy near a nonsingular bounce
- Imperfect fluids, Lorentz violations and Finsler Cosmology
- Cosmological equivalence between the Finsler-Randers space-time and the DGP gravity model
- Limits on violations of Lorentz Symmetry from Gravity Probe B
- Cyclic cosmology from Lagrange-multiplier modified gravity
- Stringy Space-Time Foam, Finsler-like Metrics and Dark Matter Relics
- Cyclic Universes from General Collisionless Braneworld Models
- Covariant kinematics and gravitational bounce in Finsler space-times
- Finslerian spaces possessing local relativistic symmetry
- Cyclic and Ekpyrotic Universes in Modified Finsler Osculating Gravity on Tangent Lorentz Bundles
- Lorentz Invariance Violation and Symmetry in Randers--Finsler Spaces
- Geodesics and the magnitude-redshift relation on cosmologically symmetric Finsler spacetimes
- Phantom without ghost
- Bouncing black holes in quantum gravity and the Fermi gamma-ray excess
- Weak field equations and generalized FRW cosmology on the tangent Lorentz bundle
- Primordial magnetic fields from a non-singular bouncing cosmology
- On Fermat's principle for causal curves in time oriented Finsler spacetimes
Cited by in corpus (22)
- Holographic bounce
- Cosmological Finsler Spacetimes
- Cosmology of Lorentz fiber-bundle induced scalar-tensor theories
- Cosmological applications of Myrzakulov gravity
- Dynamics in Varying vacuum Finsler-Randers Cosmology
- Dark energy and accelerating cosmological evolution from osculating Barthel-Kropina geometry
- Schwarzschild-like solutions in Finsler-Randers gravity
- Finsler-Randers-Sasaki gravity and cosmology
- Dynamical system analysis of Myrzakulov gravity
- Dark Gravitational Sectors on a Generalized Scalar-Tensor Vector Bundle Model and Cosmological Applications
- Transit cosmological models in Myrzakulov F(R,T) gravity theory
- Applications of the Schwarzschild-Finsler-Randers model
- Charged particle motions near non-Schwarzschild black holes with external magnetic fields in modified theories of gravity
- cosmology: From Pseudo-Bang to Pseudo-Rip
- Broken Scale Invariance, Gravity Mass, and Dark Energy in Modified Einstein Gravity with Two Measure Finsler Like Variables
- Gravitational Field on the Lorentz Tangent Bundle: Generalized Paths and Field Equations
- Creation of wormholes during the cosmological bounce
- Lorentz Violation in Finsler Geometry
- Anisotropic Conformal Dark Gravity on the Lorentz Tangent Bundle Spacetime
- Trajectories of astroparticles in pseudo-Finsler spacetime with the most general modified dispersion
- Birkhoff Theorem for Berwald Finsler spacetimes
- Bouncing cosmological model with general relativistic hydrodynamics in extended gravity