Light Cone Consistency in Bimetric General Relativity
J. Brian Pitts, W. C. Schieve (The University of Texas at Austin)
TL;DR
This paper examines the conditions necessary for ensuring light cone consistency in bimetric general relativity, addressing foundational issues about the nature of gravity and spacetime structure.
Contribution
It provides recent progress on the criteria for light cone consistency in bimetric theories, advancing understanding of their theoretical viability.
Findings
Identifies conditions for light cone consistency
Discusses prospects for satisfying these conditions
Highlights implications for gravity as a field in flat spacetime
Abstract
General relativity can be formally derived as a flat spacetime theory, but the consistency of the resulting curved metric's light cone with the flat metric's null cone has not been adequately considered. If the two are inconsistent, then gravity is not just another field in flat spacetime after all. Here we discuss recent progress in describing the conditions for consistency and prospects for satisfying those conditions.
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