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Bianchi I effective dynamics in Quantum Reduced Loop Gravity

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arxiv 1901.07140 v1 pith:XD5YZVFX submitted 2019-01-22 gr-qc

Emanuele Alesci , Gioele Botta , Giovanni Luzi , Gabriele V. Stagno This is my paper · ORCID
classification gr-qc
keywords quantumloopdynamicseffectivegravityreducedbianchiscalar
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abstract

The effective quantum dynamics of Bianchi I spacetime is addressed within the statistical regularization scheme in Quantum Reduced Loop Gravity. The case of a minimally coupled massless scalar field is studied and compared with the effective $\bar{\mu}-$Loop Quantum Cosmology. The dynamics provided by the two approaches match in the semiclassical limit but differ significantly after the bounces. Analytical and numerical inspections show that energy density, expansion scalar and shear are bounded also in Quantum Reduced Loop Gravity and the classical singularity is resolved for generic initial conditions in all spatial directions.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Quantum Damping of Cosmological Shear: A New Prediction from Loop Quantum Cosmologies

    gr-qc 2025-10 reject novelty 5.0 of 10

    In mLQC-I, Bianchi I shear is claimed to decay exponentially after the bounce, producing isotropization independent of the matter content.

  2. Quantum-reduced loop gravity: New perspectives on the kinematics and dynamics

    gr-qc 2024-12 conditional novelty 5.0 of 10

    The paper reformulates quantum-reduced loop gravity with a master constraint operator and finds that its single-node Hamiltonian matches the Bianchi I loop quantum cosmology Hamiltonian.

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