2 papers
math-ph2026
Integrating Polchinski's equation by convergent binary tree expansions
Paul Obernolte, Manfred Salmhofer
We give a solution to Polchinski's equation for the Wilsonian effective action in terms of an expansion in binary trees, and prove that this expansion converges in fermionic field…
math-ph2025
The majorant method for the fermionic effective action
Wilhelm Kroschinsky, Domingos H. U. Marchetti, Manfred Salmhofer
We revisit the problem of controlling Polchinski's equation by the solution of an associate Hamilton-Jacobi equation which determines a norm majorant for the fermionic effective ac…