Gravitational Origin of Phantom Dark Energy and Late Cosmic Acceleration

Abstract

In this letter, dark energy is obtained using dual roles of the Ricci scalar (as a physical field as well as geometry). Dark energy density, obtained here, mimics phantom and the derived Friedmann equation contains a term ${\rho }_{\mathrm{de}}^2/2\lambda$ with ${\rho }_{\mathrm{de}}$ being the dark energy density and $\lambda$ being the cosmic tension. It is like brane-gravity inspired Friedmann equation, which arises without using the brane-gravity theory. It is found that acceleration is transient for $\lambda <0$, but for $\lambda >0$, expansion is found to encounter big-rip problem. It is shown that this problem can be avoided if dark energy behaves as barotropic fluid and generalized Chaplygin gas simultaneously. Moreover, time for transition (from deceleration to acceleration of the universe) is derived as a function of equation of state parameter ${\rm w}_{\rm de} = p_[rm de}/ρ_{\rm de}$ with $p_{\mathrm{de}}$ being the pressure for dark energy fluid..

arXiv comment16 pages

References in corpus (61)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
• A Phantom Menace? Cosmological consequences of a dark energy component with super-negative equation of state
• Cosmology and the Fate of Dilatation Symmetry
• Quintessence, Cosmic Coincidence, and the Cosmological Constant
• Is Cosmic Speed-Up Due to New Gravitational Physics?
• Phantom Energy and Cosmic Doomsday
• Modified gravity with negative and positive powers of the curvature: unification of the inflation and of the cosmic acceleration
• Generalized Chaplygin Gas, Accelerated Expansion and Dark Energy-Matter Unification
• k-Inflation
• The High-Z Supernova Search: Measuring Cosmic Deceleration and Global Cur vature of the Universe Using Type Ia Supernovae
• Kinetically Driven Quintessence
• Curvature Quintessence
• Modified Gauss-Bonnet theory as gravitational alternative for dark energy
• MAXIMA-1: A Measurement of the Cosmic Microwave Background Anisotropy on angular scales of 10 arcminutes to 5 degrees
• Properties of singularities in (phantom) dark energy universe
• The Cosmic Triangle: Revealing the State of the Universe
• Late-time cosmology in (phantom) scalar-tensor theory: dark energy and the cosmic speed-up
• Unification of Dark Matter and Dark Energy: the Inhomogeneous Chaplygin Gas
• Cosmology with Ultra-light Pseudo-Nambu-Goldstone Bosons
• Cosmology with a Primordial Scaling Field
• Inhomogeneous Equation of State of the Universe: Phantom Era, Future Singularity and Crossing the Phantom Barrier
• Can modified gravity explain accelerated cosmic expansion?
• Constraints on Cosmological Models from Hubble Space Telescope Observations of High-z Supernovae
• The final state and thermodynamics of dark energy universe
• Quintessence arising from exponential potentials
• Cosmological Evolution of the Rolling Tachyon
• Evolution of the Scale Factor with a Variable Cosmological Term
• Reconciling dark energy models with f(R) theories
• Cosmological Dynamics of Phantom Field
• Can the Chaplygin gas be a plausible model for dark energy?
• The State of the Dark Energy Equation of State
• Quantum effects can render w<-1 on cosmological scales
• Modified gravity with $\ln R$ terms and cosmic acceleration
• A Measurement of the Angular Power Spectrum of the CMB from l = 100 to 400
• Super-Acceleration from Massless, Minimally Coupled ${\varphi }^4$
• First Estimations of Cosmological Parameters From BOOMERANG
• Quantum escape of sudden future singularity
• Phenomenology of a realistic accelerating universe using only Planck-scale physics
• Tachyon couplings on non-BPS D-branes and Dirac-Born-Infeld action
• Consistent modified gravity: dark energy, acceleration and the absence of cosmic doomsday
• The Robustness of Quintessence
• You need not be afraid of phantom energy
• Accelerated Cosmological Models in Ricci squared Gravity
• Relic Gravity Waves from Braneworld Inflation
• A measurement of Omega from the North American test flight of BOOMERANG
• Latest Supernova data in the framework of Generalized Chaplygin Gas model
• The fate of (phantom) dark energy universe with string curvature corrections
• A new cosmological tracker solution for Quintessence
• Dark energy and cosmological solutions in second-order string gravity
• The Force of Gravity from a Lagrangian containing Inverse Powers of the Ricci Scalar
• Palatini Formulation of Modified Gravity with $\ln R$ Terms
• Constraining Inverse Curvature Gravity with Supernovae
• WMAPing the Universe: Supersymmetry, Dark Matter, Dark Energy, Proton Decay and Collider Physics
• Alternatives to Quintessence Model Building
• Avoidance of Big Rip In Phantom Cosmology by Gravitational Back Reaction
• Slow-roll parameters in braneworld cosmologies
• Future Universe With w < -1 Without Big Smash
• Cosmological constraints on a classical limit of quantum gravity

Cited by in corpus (6)

• Quantum Stability of a w < - 1 Phase of Cosmic Acceleration
• Black-Bounce in $f(T)$ Gravity
• Curvature Inspired Cosmological Scenario
• Reconstructing the properties of dark energy from recent observations
• Acceleration and Deceleration in Curvature Induced Phantom Model of the Late and Future Universe, Cosmic Collapse as Well as its Quantum Escape
• A Note on Gravitational Memory in F(R)-theories and their Equivalent Scalar-Tensor Theories