Parametrized post-Newtonian expansion of Chern-Simons gravity

Journal Article · Fri Jun 15 04:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.124022· OSTI ID:20935328

Alexander, Stephon; Yunes, Nicolas ^[1]

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1. Center for Gravitational Wave Physics, Institute for Gravitational Physics and Geometry, Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802 (United States)

We investigate the weak-field, post-Newtonian (PN) expansion to the solution of the field equations in Chern-Simons (CS) gravity with a perfect fluid source. In particular, we study the mapping of this solution to the parametrized post-Newtonian (PPN) formalism to 1 PN order in the metric. We find that the PPN parameters of Chern-Simons gravity are identical to those of general relativity, with the exception of the inclusion of a new term that is proportional to the Chern-Simons coupling parameter and the curl of the PPN vector potentials. We also find that the new term is naturally enhanced by the nonlinearity of spacetime and we provide a physical interpretation for it. By mapping this correction to the gravito-electromagnetic framework, we study the corrections that this new term introduces to the acceleration of point particles and the frame-dragging effect in gyroscopic precession. We find that the CS correction to these classical predictions could be used by current and future experiments to place bounds on intrinsic parameters of Chern-Simons gravity and, thus, string theory.

• OSTI ID: 20935328
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 12 Vol. 75; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATION
CORRECTIONS
FIELD EQUATIONS
GENERAL RELATIVITY THEORY
GRAVITATION
IDEAL FLOW
MAPPING
MATHEMATICAL SOLUTIONS
NONLINEAR PROBLEMS
POTENTIALS
SPACE-TIME
STRING THEORY
VECTORS