We introduce a new method for evaluating the oscillatory integrals which describe natural
interference patterns. As an illustrative example of contemporary interest, we consider …

A bstract The energy-energy correlator (EEC) is an observable of wide interest for collider
physics and Standard Model measurements, due to both its simple theoretical description in …

A bstract There are two well-known approaches to studying nonperturbative aspects of
quantum mechanical systems: saddle point analysis of the partition functions in Euclidean …

A bstract We consider a class of quantum field theories and quantum mechanics, which we
couple to ℤ N topological QFTs, in order to classify non-perturbative effects in the original …

A bstract We make use of Borel resummation to extract the exact time dependence from the
divergent series found in the context of stochastic inflation. Correlation functions of self …

Quantum deformed potentials arise naturally in quantum mechanical systems of one
bosonic coordinate coupled to N f Grassmann valued fermionic coordinates, or to a …

A bstract We derive the semiclassical contributions from the real and complex bions in the
two-dimensional ℂP N− 1 sigma model on ℝ× S 1 with a twisted boundary condition. The …

A bstract We consider the massless charge-N Schwinger model and its deformation with two
four-fermion operators. Without the deformations, this model exhibits chiral symmetry …

We study resurgence in the context of the partition function of 2-dimensional SU (N) and U
(N) Yang–Mills theory on a surface of genus h. After discussing the properties of the …

Instantons and renormalons play important roles at the interface between perturbative and
non-perturbative quantum field theory. They are both associated with branch points in the …