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hep-th2025
Functional Renormalization Group flows as diffusive Hamilton-Jacobi-type equations
Adrian Koenigstein, Martin J. Steil, Stefan Floerchinger
In order to find reliable and efficient numerical approximation schemes, we suggest to identify the Functional Renormalization Group flow equations of one-particle irreducible two-…
hep-th2025
Shear viscosity of a relativistic scalar field from functional renormalization
Tim Stoetzel, Stefan Floerchinger
Renormalization group flow equations of the fluid dynamical shear viscosity transport coefficient of a relativistic real scalar field are derived. The flowing effective action cont…