https://doi.org/10.1140/epjc/s10052-020-8325-8
Regular Article - Theoretical Physics
Effective action from the functional renormalization group
1
Department of Physics, Kindai University, 577-8502, Higashi-Osaka, Osaka, Japan
2
Department of Nuclear Physics and Physical Engineering, Czech Technical University, Břehova 7, 11519, Prague, Czech Republic
Received:
1
March
2020
Accepted:
4
August
2020
Published online:
22
September
2020
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 
by integrating the flow equation from the ultraviolet scale down to 
. The resulting effective action consists of local terms and nonlocal terms with unique coefficients.
© The Author(s) 2020
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