Gravitational Wilson loop in discrete quantum gravity

Journal Article · Thu Apr 15 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.084048· OSTI ID:21409620

Hamber, H W; Williams, R M ^[1]

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1. Department of Physics and Astronomy, University of California Irvine, California 92717 (United States)

Results for the gravitational Wilson loop, in particular, the area law for large loops in the strong coupling region, and the argument for an effective positive cosmological constant, discussed in a previous paper, are extended to other proposed theories of discrete Euclidean quantum gravity in the strong coupling limit. We argue that the area law is a generic feature of almost all nonperturbative Euclidean lattice formulations, for sufficiently strong gravitational coupling. The effects on gravitational Wilson loops of the inclusion of various types of light matter coupled to lattice quantum gravity are discussed as well. One finds that significant modifications to the area law can only arise from extremely light matter particles. The paper ends with some general comments on possible, physically observable, consequences.

• OSTI ID: 21409620
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 8 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COSMOLOGICAL CONSTANT
COUPLING
EUCLIDEAN SPACE
FIELD THEORIES
MATHEMATICAL MODELS
MATHEMATICAL SPACE
MODIFICATIONS
PARTICLE MODELS
PARTICLES
QUANTUM FIELD THEORY
QUANTUM GRAVITY
RIEMANN SPACE
SPACE
STRONG-COUPLING MODEL
WILSON LOOP