2 papers
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…
gr-qc2025
Energy-momentum response to metric perturbations in the fluid dynamic regime
Tim Stoetzel, Rebekka Fechtner, Stefan Floerchinger
The interplay of relativistic fluid dynamics and spacetime geometry is discussed in the regime of small wave numbers and frequencies. A combination of gravitational Ward identities…