Transient cosmic acceleration from interacting fluids

Abstract

Recent investigations seem to favor a cosmological dynamics according to which the accelerated expansion of the Universe may have already peaked and is now slowing down again \cite{sastaro}. As a consequence, the cosmic acceleration may be a transient phenomenon. We investigate a toy model that reproduces such a background behavior as the result of a time-dependent coupling in the dark sector which implies a cancelation of the "bare" cosmological constant. With the help of a statistical analysis of Supernova Type Ia (SNIa) data we demonstrate that for a certain parameter combination a transient accelerating phase emerges as a pure interaction effect.

Latex file, 23 pages, 21 figures in eps format. Discussion enlarged, new subsection on scalar field dynamics included, accepted for publication in JCAP.

References in corpus (27)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Dynamics of dark energy
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Cosmology and the Fate of Dilatation Symmetry
• New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
• Improved Dark Energy Constraints from ~100 New CfA Supernova Type Ia Light Curves
• Dark Energy and Gravity
• Dynamics of dark energy with a coupling to dark matter
• Dark Energy and Dark Gravity
• Dynamics of interacting dark energy
• Le Chatelier-Braun principle in cosmological physics
• Stability of the curvature perturbation in dark sectors' mutual interacting models
• Dark Interactions and Cosmological Fine-Tuning
• Constraining Interactions in Cosmology's Dark Sector
• Cosmological Evolution of Interacting Phantom Energy with Dark Matter
• Interacting holographic dark energy
• The imprint of the interaction between dark sectors in large scale cosmic microwave background anisotropies
• Scalar-field-dominated cosmology with a transient accelerating phase
• Dynamics of Interacting Quintessence Models: Observational Constraints
• Current constraints on interacting holographic dark energy
• New interactions in the dark sector mediated by dark energy
• Cosmological consequences of a possible $\Lambda$-dark matter interaction
• Cosmological model with interactions in the dark sector
• An Interacting Dark Energy Model for the Expansion History of the Universe
• Six Puzzles for LCDM Cosmology
• Cosmology with interaction in the dark sector
• Dark Energy: A Unifying View

Cited by in corpus (36)

• Dark Matter and Dark Energy Interactions: Theoretical Challenges, Cosmological Implications and Observational Signatures
• Galileon inflation
• Cosmological Evolution With Interaction Between Dark Energy And Dark Matter
• Equilateral Non-Gaussianity and New Physics on the Horizon
• The (not so) squeezed limit of the primordial 3-point function
• Cosmological perturbations in Massive Gravity and the Higuchi bound
• Conformal Invariance, Dark Energy, and CMB Non-Gaussianity
• On holographic dark-energy models
• On Classification of Models of Large Local-Type Non-Gaussianity
• A thermodynamic motivation for dark energy
• Shapes of primordial non-Gaussianities in the Horndeski's most general scalar-tensor theories
• Primordial fluctuations and non-Gaussianities from multifield DBI Galileon inflation
• Could the cosmic acceleration be transient? A cosmographic evaluation
• Non-Gaussianity in the Cosmic Microwave Background Anisotropies at Recombination in the Squeezed limit
• Gravitational Waves and Scalar Perturbations from Spectator Fields
• Inflationary signatures of single-field models beyond slow-roll
• Cosmological Hysteresis and the Cyclic Universe
• Probing a stationary non-Gaussian background of stochastic gravitational waves with pulsar timing arrays
• Flat limits of curved interacting cosmic fluids
• Effective Field Theory of Multi-Field Inflation a la Weinberg
• Perturbations for transient acceleration
• On the Trispectrum of Galileon Inflation
• Singularities in cosmologies with interacting fluids
• Coupled quintessence with a possible transient accelerating phase
• Differentiating G-inflation from String Gas Cosmology using the Effective Field Theory Approach
• Revisiting cosmic acceleration with DESI BAO
• Decaying Vacuum Inflationary Cosmologies: A Complete Scenario Including Curvature Effects
• Trispectrum from Co-dimension 2(n) Galileons
• Reconstruction of the interaction term between dark matter and dark energy using SNe Ia
• Do current observations support transient acceleration of our universe?
• Transient Accelerating Scalar Models with Exponential Potential
• Signature of the interaction between dark sectors in the reionization process
• Dynamical evolution of quintessence cosmology in a physical phase space
• DBI Lifshitz Inflation
• Transient cosmic acceleration
• A class of transient acceleration models consistent with Big Bang Cosmology