Conformally Coupled Tachyonic Dark Energy
arXiv:1903.06028 · doi:10.1103/PhysRevD.100.043539
Abstract
We present and study a conformally coupled dark energy model, characterised by an interaction between a tachyon field , with an inverse square potential , and the matter sector. A detailed analysis of the cosmological outcome reveals different possibilities, in contrast with the previously studied uncoupled model, for which there exists only one stable critical point that gives late-time acceleration of the Universe. The introduction of the coupling translates into an energy exchange between the fluids. We find the interesting possibility of the emergence of a new fixed point, which is a scaling solution and an attractor of the system. In this case, it is possible to describe an everlasting Universe with , therefore alleviating the cosmic coincidence problem. However, we find that, in order for the evolution to be cosmologically viable, there is the need to introduce one uncoupled matter species, dominant at early times.
arXiv comment18 pages, 7 figures. V3: Matches published version
References in corpus (80)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- Measurements of Omega and Lambda from 42 High-Redshift Supernovae
- Planck 2015 results. XIII. Cosmological parameters
- Dynamics of dark energy
- The Cosmological Constant and Dark Energy
- Particle Dark Matter: Evidence, Candidates and Constraints
- Cosmological Constant - the Weight of the Vacuum
- The Cosmological Constant
- A direct empirical proof of the existence of dark matter
- Coupled Quintessence
- Exponential potentials and cosmological scaling solutions
- Kinetically Driven Quintessence
- The String Dilaton and a Least Coupling Principle
- Rolling Tachyon
- Tachyon Matter
- Cosmology with a Primordial Scaling Field
- Quintessence: A Review
- Scaling solutions in general non-minimal coupling theories
- Field Theory of Tachyon Matter
- Interacting Quintessence
- Dark Matter and Dark Energy Interactions: Theoretical Challenges, Cosmological Implications and Observational Signatures
- Quintessence arising from exponential potentials
- Cosmological Evolution of the Rolling Tachyon
- Cosmology with tachyon field as dark energy
- Dynamical systems applied to cosmology: dark energy and modified gravity
- Can the clustered dark matter and the smooth dark energy arise from the same scalar field ?
- The cosmon model for an asymptotically vanishing time-dependent cosmological ``constant''
- Gravity assisted dark energy dominance and cosmic acceleration
- Tachyons, Scalar Fields and Cosmology
- Extended tachyon field, Chaplygin gas and solvable k-essence cosmologies
- Dynamics of dark energy with a coupling to dark matter
- Stationary dark energy: the present universe as a global attractor
- Assisted inflation via tachyon condensation
- Prospects and Problems of Tachyon Matter Cosmology
- Inflation from a Tachyon Fluid?
- What is needed of a tachyon if it is to be the dark energy?
- Coupled dark energy: Towards a general description of the dynamics
- Interactions in Scalar Field Cosmology
- Phase-Space analysis of Teleparallel Dark Energy
- Thoughts on Tachyon Cosmology
- Cosmological dynamics of the tachyon with an inverse power-law potential
- A new view of k-essence
- Growing Matter
- Brane cosmology driven by the rolling tachyon
- Self-similar cosmological solutions with a non-minimally coupled scalar field
- Tracking solutions in tachyon cosmology
- Applications of scalar attractor solutions to Cosmology
- Stationary dark energy with a baryon-dominated era: solving the coincidence problem with a linear coupling
- General Scalar Fields as Quintessence
- Lectures on the Cosmological Constant Problem
- Implementing Power Law Inflation with Tachyon Rolling on the Brane
- Variable gravity: A suitable framework for quintessential inflation
- Dynamics of Quintessence Models of Dark Energy with Exponential Coupling to the Dark Matter
- Tachyonic Inflation in the Braneworld Scenario
- Models of quintessence coupled to the electromagnetic field and the cosmological evolution of alpha
- Cosmological Evolution of Quintessence and Phantom with a New Type of Interaction in Dark Sector
- Inflationary Attractor from Tachyonic Matter
- Coupled quintessence with a CDM background: removing the tension
- Dynamics of interacting quintessence
- Quintessence with quadratic coupling to dark matter
- Asymptotic behavior of the warm inflation scenario with viscous pressure
- Slowly varying tachyon and tachyon potential
- Stability Analysis in Tachyonic Potential Chameleon cosmology
- Cosmological Scaling Solutions of Multiple Tachyon Fields with Inverse Square Potentials
- Dynamics of coupled phantom and tachyon fields
- Exact solutions for the interacting tachyonic-dark matter system
- Generalized dark energy interactions with multiple fluids
- Study Of Tachyon Dynamics For Broad Classes of Potentials
- A new approach in stability analysis: case study: tachyon cosmology with non-minimally coupled scalar field-matter
- Coupled tachyonic dark energy: a dynamical analysis
- Dark Matter: A Brief Review
- Inhomogeneous cosmologies with tachyonic dust as dark matter
- Kinetically coupled dark energy
- Mass freezing in growing neutrino quintessence
- New scaling solutions in cubic Horndeski theories
- Dynamics of Tachyon and Phantom Field beyond the Inverse Square Potentials
- Most general cubic-order Horndeski Lagrangian allowing for scaling solutions and the application to dark energy
- Cosmological Scaling Solutions with Tachyon:Modified Gravity Model
- A rolling tachyon field for both dark energy and dark halos of galaxies
- Tachyon field non-minimally coupled to massive neutrino matter
Cited by in corpus (17)
- Robust Preference for Dynamical Dark Energy in DESI BAO and SN Measurements
- Dark Energy, the Swampland and the Equivalence Principle
- Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
- Scalar field dark matter and dark energy: a hybrid model for the dark sector
- Dark D-Brane Cosmology: from background evolution to cosmological perturbations
- Tachyonic cosmology with cubic contractions of the Riemann tensor
- Anisotropic Scalar Field Dark Energy with a Disformally Coupled Yang-Mills Field
- Conformally and Disformally Coupled Vector field Models of Dark Energy
- Dissecting kinetically coupled quintessence: phenomenology and observational tests
- Coupled dark energy model inspired from general conformal transformation
- Cosmological fluids with boundary term couplings
- Spherical collapse in coupled quintessence with a CDM background
- A proper scalar product for tachyon representations in configuration space
- A misleading naming convention: de Sitter `tachyonic' scalar fields
- Interacting tachyon with varying mass dark matter
- Kinetic coupled tachyon: A dynamical system analysis
- Phase space analysis and cosmography of a two-fluid cosmological model