Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2004-07-13
Phys.Rev. D70 (2004) 103512
Physics
High Energy Physics
High Energy Physics - Theory
22 pages, 5 figures, substantial changes in the presentation, results are the same, to appear in Physical Review D
Scientific paper
10.1103/PhysRevD.70.103512
We study some consequences of noncommutativity to homogeneous cosmologies by introducing a deformation of the commutation relation between the minisuperspace variables. The investigation is carried out for the Kantowski-Sachs model by means of a comparative study of the universe evolution in four different scenarios: the classical commutative, classical noncommutative, quantum commutative, and quantum noncommutative. The comparison is rendered transparent by the use of the Bohmian formalism of quantum trajectories. As a result of our analysis, we found that noncommutativity can modify significantly the universe evolution, but cannot alter its singular behavior in the classical context. Quantum effects, on the other hand, can originate non-singular periodic universes in both commutative and noncommutative cases. The quantum noncommutative model is shown to present interesting properties, as the capability to give rise to non-trivial dynamics in situations where its commutative counterpart is necessarily static.
Barbosa Dourado G.
Pinto-Neto Nelson
No associations
LandOfFree
Noncommutative Geometry and Cosmology 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 Noncommutative Geometry and Cosmology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Noncommutative Geometry and Cosmology will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-335162