Large Quantum Gravity Effects: Backreaction on Matter
Open accessAbstract
We re-examine the large quantum gravity effects discovered by Ashtekar in the context of (2+1)-dimensional gravity coupled to matter. We study an alternative one-parameter family of coherent states of the theory in which the large quantum gravity effects on the metric can be diminished, at the expense of losing coherence in the matter sector. Which set of states is the one that occurs in nature will determine if the large quantum gravity effects are actually observable as wild fluctuations of the metric or rapid loss of coherence of matter fields.
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Work on circularly symmetric midi-superspace models has led to unexpected bounds on the Hamiltonian.
“Certain matter couplings in supergravity have been studied [104, 196], and work on circularly symmetric “midi-superspace models” has led to some surprising results, including unexpected bounds on the Hamiltonian [27, 32, 137, 53, 265, 224].”
From Quantum Gravity in 2 + 1 Dimensions: The Case of a Closed Universe (2005) · cites this paper as [137]
The paper discusses a 2+1-dimensional gravity model coupled to a scalar field (p. 1), but its reported surprising result concerns large metric fluctuations, not bounds on the Hamiltonian (pp. 1, 4). Searches for Hamiltonian bounds and circular symmetry found no passage in our copy that establishes the attributed result. (LLM, conf=0.74)
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Quantum Gravity in 2 + 1 Dimensions: The Case of a Closed Universe
Carlip, S. (2005) · Living Reviews in Relativity · doi:10.12942/lrr-2005-1 · Cited by 172 · see citing works
- Authors
- Gambini, R., & Pullin, J.
- Affiliations
- Universidad de la República de Uruguay (UY)
- Pennsylvania State University (US)
- Venue
- Modern Physics Letters A
- Publisher
- World Scientific Pub Co Pte Lt
- Published
- 1997-10-20
- Volume
- 12
- Issue
- 32
- Pages
- 2407-2413
- ISSN
- 0217-7323 (ISSN-L)
- 1793-6632
- OpenAlex
- W1979068554
- Cited by
- 21
- References
- 0
- Citations by year
- 2022: 2 · 2021: 1 · 2020: 1
- FWCI
- 2.78
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Modern Physics Letters A (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- Civil War Book Review (submittedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- arXiv (Cornell University)
- Funders
- National Science Foundation (9423950, 9406269)
- Alfred P. Sloan Foundation
- Pennsylvania State University
- Comisión Nacional de Investigación Científica y Tecnológica
- Topics
- Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Noncommutative and Quantum Gravity Theories
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Relativity and Gravitational Theory
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Black Holes and Theoretical Physics
- Keywords
- three-dimensional gravity, coherent states, metric fluctuations, quantum gravity phenomenology
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