Singularities in cosmologies with interacting fluids
arXiv:1202.1407 · doi:10.1016/j.physletb.2012.04.057
Abstract
We study the dynamics near finite-time singularities of flat isotropic universes filled with two interacting but otherwise arbitrary perfect fluids. The overall dynamical picture reveals a variety of asymptotic solutions valid locally around the spacetime singularity. We find the attractor of all solutions with standard decay, and for `phantom' matter asymptotically at early times. We give a number of special asymptotic solutions describing universes collapsing to zero size and others ending at a big rip singularity. We also find a very complicated singularity corresponding with a logarithmic branch point that resembles of cyclic universe, and give an asymptotic local series representation of the general solution in the neighborhood of infinity.
15 pages, matches version to appear in Phys.Lett.B., more references, derivation of main system added, various improvements
References in corpus (11)
- Large-scale instability in interacting dark energy and dark matter fluids
- Dynamics of interacting dark energy
- Cosmologies with Energy Exchange
- Decaying Gravity
- The transient acceleration from time-dependent interacting dark energy models
- Interacting Cosmological Fluids and the Coincidence Problem
- The Dominant Balance at Cosmological Singularities
- Nonlinear perturbations for dissipative and interacting relativistic fluids
- Brane singularities and their avoidance
- Asymptotics of flat, radiation universes in quadratic gravity
- Cosmic acceleration from interaction of ordinary fluids
Cited by in corpus (10)
- Cosmological Evolution With Interaction Between Dark Energy And Dark Matter
- Diffusion in unimodular gravity: Analytical solutions, late-time acceleration, and cosmological constraints
- Infinity in string cosmology: A review through open problems
- Flat limits of curved interacting cosmic fluids
- The initial state of generalized radiation universes
- Brane singularities with mixtures in the bulk
- Is interacting vacuum viable?
- Structure of infinity in cosmology
- Interacting vacuum at infinity
- Asymptotic Poincaré compactification and finite-time singularities