Physical Review D - Accepted Paper: All generalized dilaton theories from 4 gravities
journals.aps.org
A new Birkhoff theorem sweeps up every generalized dilaton gravity into one unified framework — revealing that nature's gravitational symmetries run far deeper than Einstein imagined.
Birkhoff's TheoremDilaton GravityHorndeski TheoryDimensional Reduction
Theory Briefing
- A new Birkhoff theorem is proven covering all gravitational theories reducible to integrable 2D Horndeski theory, vastly expanding a century-old result.
- The paper unifies four distinct classes of 4D gravity under a single dilaton framework, exposing hidden structural symmetry across theories.
- This generalization challenges the assumption that Birkhoff's uniqueness result is special to general relativity, suggesting universality in gravitational symmetry.