Wednesday, October 3, 2012

1210.0418 (Claus Kiefer et al.)

Interpretation of the triad orientations in loop quantum cosmology    [PDF]

Claus Kiefer, Christian Schell
Loop quantum cosmology allows for arbitrary superpositions of the triad variable. We show here how these superpositions can become indistinguishable from a classical mixture by the interaction with fermions. We calculate the reduced density matrix for a locally rotationally symmetric Bianchi I model and show that the purity factor for the triads decreases by decoherence. In this way, the Universe assumes a definite orientation.
View original: http://arxiv.org/abs/1210.0418

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