Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2008-06-17
Class.Quant.Grav.25:195006,2008
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
17 pages
Scientific paper
10.1088/0264-9381/25/19/195006
Fermions play a special role in homogeneous models of quantum cosmology because the exclusion principle prevents them from forming sizable matter contributions. They can thus describe the matter ingredients only truly microscopically and it is not possible to avoid strong quantum regimes by positing a large matter content. Moreover, possible parity violating effects are important especially in loop quantum cosmology whose basic object is a difference equation for the wave function of the universe defined on a discrete space of triads. The two orientations of a triad are interchanged by a parity transformation, which leaves the difference equation invariant for ordinary matter. Here, we revisit and extend loop quantum cosmology by introducing fermions and the gravitational torsion they imply, which renders the parity issue non-trivial. A treatable locally rotationally symmetric Bianchi model is introduced which clearly shows the role of parity. General wave functions cannot be parity-even or odd, and parity violating effects in matter influence the microscopic big bang transition which replaces the classical singularity in loop quantum cosmology.
Bojowald Martin
Das Rupam
No associations
LandOfFree
Fermions in Loop Quantum Cosmology and the Role of Parity 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 Fermions in Loop Quantum Cosmology and the Role of Parity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fermions in Loop Quantum Cosmology and the Role of Parity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-409149