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254 papers · 1 filter
Resurgence of large order relations
Coenraad Marinissen, Alexander van Spaendonck, Marcel Vonk
One of the main applications of resurgence in physics is the decoding of nonperturbative effects through large order relations. These relations connect perturbative asymptotic expa…
Flow Oriented Perturbation Theory
Alexandre Salas-Bernárdez, Michael Borinsky, Zeno Capatti +1
Flow Oriented Perturbation Theory (FOPT) is a novel approach to Feynman diagrams based on the coordinate (position) space description of Quantum Field Theories (QFT). FOPT offers i…
Flow-oriented perturbation theory
Michael Borinsky, Zeno Capatti, Eric Laenen +1
We introduce a new diagrammatic approach to perturbative quantum field theory, which we call flow-oriented perturbation theory (FOPT). Within it, Feynman graphs are replaced by str…
Finite Callan-Symanzik renormalisation for multiple scalar fields
Sander Mooij, Mikhail Shaposhnikov
We study a finite, divergence free approach to renormalisation originally proposed in the early '70s by Blaer and Young, and Callan. It is based on equations similar to the Callan-…
QFT without infinities and hierarchy problem
Sander Mooij, Mikhail Shaposhnikov
The standard way to do computations in Quantum Field Theory (QFT) often results in the requirement of dramatic cancellations between contributions induced by a "heavy" sector into…
Gravitational waves from spectator Gauge-flation
Oksana Iarygina, Evangelos I. Sfakianakis
We investigate the viability of inflation with a spectator sector comprised of non-Abelian gauge fields coupled through a higher order operator. We dub this model "spectator Gauge-…