SU(2)-invariant reduction of the 3+1 dimensional Ashtekar's gravity
arXiv:gr-qc/9705080 · doi:10.1088/0264-9381/15/3/009
Abstract
We consider a space-time with spatial sections isomorphic to the group manifold of SU(2). Triad and connection fluctuations are assumed to be SU(2)-invariant. Thus, they form a finite dimensional phase space. We perform non-perturbative path integral quantization of the model. Contarary to previous claims the path integral measure appeared to be non-singular near configurations admitting additional Killing vectors. In this model we are able to calculate the generating functional of Green functions of the reduced phase space variables exactly.
12 pages