Diffeomorphism invariant SU(N) gauge theories
Abstract
We describe a class of diffeomorphism invariant SU(N) gauge theories in N2 dimensions, together with some matter couplings. These theories have (N2-3)(N2-1) local degrees of freedom, and have the unusual feature that the constraint associated with time reparametrizations is identically satisfied. A related class of SU(N) theories in N2-1 dimensions has the constraint algebra of general relativity, but has more degrees of freedom. Non-perturbative quantization of the first type of theory via SU(N) spin networks is briefly outlined.
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