Pith. sign in

REVIEW 5 cited by

Covariance in models of loop quantum gravity: Spherical symmetry

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 1507.00329 v1 pith:PCHZRLI7 submitted 2015-07-01 gr-qc hep-th

Martin Bojowald , Suddhasattwa Brahma , Juan D. Reyes This is my paper · ORCID
classification gr-qchep-th
keywords quantumstructurealgebraconstraintconstraintscovariantfunctionsgravity
verification ladder T0 review T1 audit T2 compute T3 formal

Signed reviews

No signed human review yet.

0 comments
read the original abstract

Spherically symmetric models of loop quantum gravity have been studied recently by different methods that aim to deal with structure functions in the usual constraint algebra of gravitational systems. As noticed by Gambini and Pullin, a linear redefinition of the constraints (with phase-space dependent coefficients) can be used to eliminate structure functions, even Abelianizing the more-difficult part of the constraint algebra. The Abelianized constraints can then easily be quantized or modified by putative quantum effects. As pointed out here, however, the method does not automatically provide a covariant quantization, defined as an anomaly-free quantum theory with a classical limit in which the usual (off-shell) gauge structure of hypersurface deformations in space-time appears. The holonomy-modified vacuum theory based on Abelianization is covariant in this sense, but matter theories with local degrees of freedom are not. Detailed demonstrations of these statements show complete agreement with results of canonical effective methods applied earlier to the same systems (including signature change).

Discussion (0). Continue with ORCID to comment.

Forward citations

Cited by 5 Pith papers

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

  1. Lessons for loop quantum gravity from emergent modified gravity

    gr-qc 2024-11 conditional novelty 6.0 of 10

    Emergent modified gravity rules out most proposed loop quantum gravity black-hole models and shows that mu0 and mu-bar holonomy schemes are canonically equivalent, so they are not physically distinct.

  2. A Minkowski-core black hole with cosmological constant and electric charge

    gr-qc 2026-08 conditional novelty 5.0 of 10

    A charged anti-de Sitter regular black hole with a Minkowski core is derived from a covariant effective Hamiltonian, and its thermodynamics show a phase transition that disappears above a critical value of the regular...

  3. Motion of spinning particles around a quantum-corrected black hole without Cauchy horizons

    gr-qc 2025-09 conditional novelty 5.0 of 10

    For the covariant quantum-corrected black hole without Cauchy horizons, the effective potential, circular orbits, ISCO, and bound trajectories of spinning particles depend only weakly on the quantum parameter but stro...

  4. Periodic orbits and gravitational waveforms in quantum-corrected black hole spacetimes

    gr-qc 2025-05 conditional novelty 5.0 of 10

    For one effective quantum gravity black hole model (BH-I), the quantum parameter shifts periodic orbits and delays gravitational wave phase, while for the other model (BH-II) the effect is negligible, making BH-I pote...

  5. Testing loop quantum gravity by quasi-periodic oscillations: rotating blackholes

    gr-qc 2024-12 conditional novelty 4.0 of 10

    QPO data from GRO J1655-40 constrain the LQG parameter λ in the BCY rotating black hole metric to 0.15 (equal mass) and 0.11 (unequal mass), both consistent with Kerr.

Pith tools