出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：In Weinberg’s asymptotic safety approach, a finite dimensional critical surface for a UV stable fixed point generates a theory of quantumgravity with a finite number of physical parameters. We argue that, in an extension of Feynman’s original formulation of the theory, we recover this fixedpoint UV behavior from an exact re-arrangement of the respective perturbative series. Our results are consistent with the exact field space Wilsonian renormalization group results of Reuter et al. and with recent Hopf- algebraic Dyson-Schwinger renormalization theory results of Kreimer. We obtain the first "first principles" predictions of the dimensionless gravitational and cosmological constants and our results support the Planck scale cosmology of Bonanno and Reuter. We conclude with an estimate for the currently observed value of the cosmological constant.
