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Challenges in recovering a consistent cosmology from the effective dynamics of loop quantum gravity

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arxiv 1910.04710 v2 pith:A2HLWK4P submitted 2019-10-10 gr-qc

Andrea Dapor , Klaus Liegener , Tomasz Paw{l}owski This is my paper · ORCID
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We reexamine a set of existing procedures aimed at recovering the effective description of the dynamics of LQG in the context of cosmological solutions. In particular, the studies of those methods, to which the choice of cuboidal graphs and graph-preserving Hamiltonian is central, result in the formulation of a set of no-go statements, severely limiting the possibility of recovering a physically consistent effective dynamics this way.

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  1. Perspectives on the dynamics in a loop quantum gravity effective description of black hole interiors

    gr-qc 2019-08 conditional novelty 6.0 of 10

    Two new effective Hamiltonians for the Kantowski-Sachs black hole interior are derived from loop quantum gravity regularization, and both resolve the singularity while differing from the standard polymer Hamiltonian.

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