Loop Quantum Cosmology and the Fine Structure Constant
arXiv:1307.5527 · doi:10.1088/0264-9381/31/2/025014
Abstract
The cosmological implications of introducing a variation to the fine structure `constant', αare examined within the context of Loop Quantum Cosmology. The evolution of αis described using the model introduced by Bekenstein, Sandvik, Barrow and Magueijo, in which a ghost scalar field produces the variation. The dynamics of the system are examined in flat and closed cosmological settings. Matter consisting of the scalar field and radiation are examined with a thermodynamically motivated coupling between the two, which can lead to a series of bounces induced by both the negative density effects of the ghost field and the loop effects.
10 pages, 5 figures
References in corpus (12)
- Quantum Nature of the Big Bang: Improved dynamics
- Loop quantum cosmology of k=1 FRW models
- Corrections to the Friedmann Equations from LQG for a Universe with a Free Scalar Field
- Are loop quantum cosmos never singular?
- Avoidance of future singularities in loop quantum cosmology
- Loop Quantum Cosmology in Bianchi Type I Models: Analytical Investigation
- The behavior of non-linear anisotropies in bouncing Bianchi I models of loop quantum cosmology
- On the measure problem in slow roll inflation and loop quantum cosmology
- Quantum gravitational Kasner transitions in Bianchi-I spacetime
- Phantom Matter and the Cosmological Constant
- Bouncing Anisotropic Universes with Varying Constants
- Magnetic Bianchi I Universe in Loop Quantum Cosmology