UNREASONABLE POSTULATE IN THE PERTURBATIVE APPROACH TO QUANTUM-GRAVITY

The conventional perturbative approach to quantum gravity is based on the expansion in powers of square-root kappa, where kappa denotes the Einstein gravitational constant. The introduction of a square-root is due to the unreasonable postulate that the kappa --> 0 limit of the gravitational field is a c-number. It is more natural that it is a q-number, which can be determined explicitly by the theory, and then the expansion becomes that in powers of kappa but not of square-root kappa. Thus the nonrenormalizability of Einstein gravity should be completely reconsidered in the light of the new expansion.