194 citations · 3.1k across the 104 of their papers we have counts for
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Renormalization Group Equation and scaling solutions for f(R) gravity in exponential parametrization
Nobuyoshi Ohta, Roberto Percacci, Gian Paolo Vacca
We employ the exponential parametrization of the metric and a "physical" gauge fixing procedure to write a functional flow equation for the gravitational effective average action i…
A flow equation for f(R) gravity and some of its exact solutions
Nobuyoshi Ohta, Roberto Percacci, Gian Paolo Vacca
We write a Renormalization Group (RG) equation for the function f in a theory of gravity in the f(R) truncation. Our equation differs from previous ones due to the exponential para…
Asymptotic safety in scalar models coupled to gravity
Peter Labus, Roberto Percacci, Gian Paolo Vacca
We extend recent results on scalar-tensor theories to the case of an O(N)-invariant multiplet. Some exact fixed point solutions of the RG flow equations are discussed. We find that…
Multi-meson Yukawa interactions at criticality
Gian Paolo Vacca, Luca Zambelli
The critical behavior of a relativistic -symmetric Yukawa model at zero temperature and density is discussed for a continuous number of fermion degrees of freedom and…
Search of scaling solutions in scalar-tensor gravity
Roberto Percacci, Gian Paolo Vacca
We write new functional renormalization group equations for a scalar nonminimally coupled to gravity. Thanks to the choice of the parametrization and of the gauge fixing they are s…