Dynamics of interacting phantom scalar field dark energy in Loop Quantum Cosmology

Abstract

We study the dynamics of a phantom scalar field dark energy interacting with dark matter in loop quantum cosmology (LQC). Two kinds of coupling of the form $\alpha {\rho }_m\dot{\varphi }$ (case I) and $3\beta H({\rho }_{\varphi }+{\rho }_m)$ (case II) between the phantom energy and dark matter are examined with the potential for the phantom field taken to be exponential. For both kinds of interactions, we find that the future singularity appearing in the standard FRW cosmology can be avoided by loop quantum gravity effects. In case II, if the phantom field is initially rolling down the potential, the loop quantum effect has no influence on the cosmic late time evolution and the universe will accelerate forever with a constant energy ratio between the dark energy and dark matter.

18 pages, 7 figures, PRD published version

References in corpus (19)

• Quantum Nature of the Big Bang: Improved dynamics
• Cosmological Evolution of a Quintom Model of Dark Energy
• Loop quantum cosmology of k=1 FRW models
• Bouncing Universe with Quintom Matter
• Interacting Holographic Phantom
• Cosmological Evolution of Interacting Phantom Energy with Dark Matter
• Cosmic Duality in Quintom Universe
• Loop Quantum Gravity: An Inside View
• Quintom cosmologies with arbitrary potentials
• A String-Inspired Quintom Model Of Dark Energy
• Quantum bounce and cosmic recall
• Avoidance of Big Rip In Phantom Cosmology by Gravitational Back Reaction
• Reconstruction of Hessence Dark Energy and the Latest Type Ia Supernovae Gold Dataset
• Phantom field dynamics in loop quantum cosmology
• Inflationary universe in loop quantum cosmology
• Exact solutions for Big Bounce in loop quantum cosmology
• Dynamics of Quintom and Hessence Energies in Loop Quantum Cosmology
• Thermal fluctuations in loop cosmology
• Type I singularities and the Phantom Menace

Cited by in corpus (7)

• Are loop quantum cosmos never singular?
• Loop Quantum Cosmology: An Overview
• Dynamics of interacting dark energy model in Einstein and Loop Quantum Cosmology
• Entropy-Corrected Holographic Dark Energy
• Physical time and other conceptual issues of QG on the example of LQC
• Crossing the phantom divide line in the Holographic dark energy model in a closed universe
• Wave dynamics of phantom scalar perturbation in the background of Schwarzschild black hole