Deformed constraint algebras from loop quantum gravity Available to Purchase

We exhibit anomaly-free deformations of the classical first class constraint algebra of spherically symmetric General Relativity. These consistent deformations incorporate corrections presumably arising from a loop quantization and accord with the intuition suggesting that not just dynamics but also the concept of space-time manifolds changes in quantum gravity. These deformations may, and have served as the basis for a phenomenological approach to investigate geometrical and physical effects of possible corrections to classical equations in models for gravitational collapse and Cosmology.