Effective Action from the Functional Renormalization Group
Abstract
We study the quantum gravitational system coupled to a charged scalar, Dirac fermions, and electromagnetic fields. We use the "exact" or "functional" renormalization group equation to derive the effective action 0 by integrating the flow equation from the ultraviolet scale down to k=0. The resulting effective action consists of local terms and nonlocal terms with unique coefficients.
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