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Breaking diffeomorphism invariance and tests for the emergence of gravity
General relativity violates diffeomorphism invariance disrupting sex match the test parameters Newton formalism
2014/12/18
If general relativity is an emergent phenomenon, there may be small violations of diffeomorphism invariance. We propose a phenomenology of perturbatively small violations of general relativity by the ...
Covariant Mickelsson-Faddeev extensions of gauge and diffeomorphism algebras
Covariant Mickelsson-Faddeev extensions of gauge diffeomorphism algebras Mathematical Physics
2012/5/31
We construct new extensions of current and diffeomorphism algebras in N>3 dimensions, which are related to the Mickelsson-Faddeev algebra. The result is compatible with Dzhumadil'daev's classification...
Dynamics of Diffeomorphism Degrees of Freedom at a Horizon
Dynamics of Diffeomorphism Degrees Freedom Horizon
2010/12/20
We define a set of boundary conditions that ensure the presence of a null hypersurface with the
essential characteristics of a horizon, using the formalism of weakly isolated horizons as a guide.We t...