Dynamics of Dirac-Born-Infeld dark energy interacting with dark matter
arXiv:1209.5219 · doi:10.1103/PhysRevD.86.124049
Abstract
We study the dynamics of Dirac-Born-Infeld (DBI) dark energy interacting with dark matter. The DBI dark energy model considered here has a scalar field with a nonstandard kinetic energy term, and has potential and brane tension that are power-law functions. The new feature considered here is an interaction between the DBI dark energy and dark matter through a phenomenological interaction between the DBI scalar field and the dark matter fluid. We analyze two different types of interactions between the DBI scalar field and the dark matter fluid. In particular we study the phase-space diagrams of and look for critical points of the phase space that are both stable and lead to accelerated, late-time expansion. In general we find that the interaction between the two dark components does not appear to give rise to late-time accelerated expansion. However, the interaction can make the critical points in the phase space of the system stable. Whether such stabilization occurs or not depends on the form of the interaction between the two dark components.
10 pages revtex two-column format, 4 figures (N.Y. corresponding author). Changes to match published version
References in corpus (22)
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- Improved Dark Energy Constraints from ~100 New CfA Supernova Type Ia Light Curves
- Measuring the Baryon Acoustic Oscillation scale using the SDSS and 2dFGRS
- Large-scale instability in interacting dark energy and dark matter fluids
- Dynamics of dark energy with a coupling to dark matter
- Cosmologies with Energy Exchange
- A Microscopic Limit on Gravitational Waves from D-brane Inflation
- Stability of the curvature perturbation in dark sectors' mutual interacting models
- Dark Interactions and Cosmological Fine-Tuning
- Cosmological coincidence problem in interacting dark energy models
- The Cosmological Dynamics of Interacting Holographic Dark Energy Model
- Adiabatic instability in coupled dark energy-dark matter models
- DBI-essence
- Gravitational Wave Constraints on DBI Inflation
- A two measure model of dark energy and dark matter
- Crossing the phantom divide in an interacting generalized Chaplygin gas
- Generalised DBI-Quintessence
- Late universe dynamics with scale-independent linear couplings in the dark sector
- The Adiabatic Instability on Cosmology's Dark Side
- Toward a Unified Description of Dark Energy and Dark Matter from the Abnormally Weighting Energy Hypothesis
- Exact models with non-minimal interaction between dark matter and (either phantom or quintessence) dark energy
- Phantom energy from graded algebras