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Paper detail

Lorentz Symmetry in QFT on Quantum Bianchi I Space-Time

We develop the quantum theory of a scalar field on LQC Bianchi I geometry. In particular, we focus on single modes of the field: the evolution equation is derived from the quantum scalar constraint, and it is shown that the same equation can be obtained from QFT on an "classical" effective geometry. We investigate the dependence of this effective space-time on the wavevector of the mode (which could in principle generate a deformation in local Lorentz-symmetry), focusing our attention on the dispersion relation. We prove that when we disregard backreaction no Lorentz-violation is present, despite the effective metric being different than the classical Bianchi I one. A preliminary analysis of the correction due to inclusion of backreaction is briefly discussed in the context of Born-Oppenheimer approximation.

preprint2012arXivOpen access
Andrea DaporJerzy LewandowskiYaser Tavakoli
gr-qc
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Andrea DaporJerzy LewandowskiYaser Tavakoli

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