Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2008-03-31
Phys.Rev.D77:124025,2008
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
Revtex4, 29 pages, 20 figures, typos corrected
Scientific paper
10.1103/PhysRevD.77.124025
A model for a flat isotropic universe with a negative cosmological constant $\Lambda$ and a massless scalar field as sole matter content is studied within the framework of Loop Quantum Cosmology. By application of the methods introduced for the model with $\Lambda=0$, the physical Hilbert space and the set of Dirac observables are constructed. As in that case, the scalar field plays here the role of an emergent time. The properties of the system are found to be similar to those of the $k=1$ FRW model: for small energy densities, the quantum dynamics reproduces the classical one, whereas, due to modifications at near-Planckian densities, the big bang and big crunch singularities are replaced by a quantum bounce connecting deterministically the large semiclassical epochs. Thus in Loop Quantum Cosmology the evolution is qualitatively cyclic.
Bentivegna Eloisa
Pawlowski Tomasz
No associations
LandOfFree
Anti-deSitter universe dynamics in LQC does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Anti-deSitter universe dynamics in LQC, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anti-deSitter universe dynamics in LQC will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-197513