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Numerical Stochastic Perturbation Theory in the Schrödinger Functional
Michele Brambilla, Mattia Dalla Brida, Francesco Di Renzo +2
The Schrödinger functional (SF) is a powerful and widely used tool for the treatment of a variety of problems in renormalization and related areas. Albeit offering many conceptual…
High-loop perturbative renormalization constants for Lattice QCD (II): three-loop quark currents for tree-level Symanzik improved gauge action and n_f=2 Wilson fermions
Michele Brambilla, Francesco Di Renzo
Numerical Stochastic Perturbation Theory was able to get three- (and even four-) loop results for finite Lattice QCD renormalization constants. More recently, a conceptual and tech…
Monte Carlo simulations on the Lefschetz thimble: taming the sign problem
Marco Cristoforetti, Francesco Di Renzo, Abhishek Mukherjee +1
We present the first practical Monte Carlo calculations of the recently proposed Lefschetz thimble formulation of quantum field theories. Our results provide strong evidence that t…