3 papers
math-ph2026
Higher-Rank Connections and Deformed Schrödinger Operators
Jonah Baerman, Alba Grassi, Giovanni Ravazzini
We study the connection problem for a class of linear differential equations of order closely related to the Baxter equation of the quantum Toda chain. The space of solutions i…
math-ph2026
Higher-Rank Mathieu Opers, Toda Chain, and Analytic Langlands Correspondence
Jonah Baerman, Giovanni Ravazzini, Joerg Teschner
We study the Riemann-Hilbert problem associated to flat sections of oper connections of arbitrary rank on the twice-punctured Riemann sphere with irregular singularities of the mil…
hep-th2024
Taming non-analyticities of QFT observables
Thomas W. Grimm, Giovanni Ravazzini, Mick van Vliet
Many observables in quantum field theories are involved non-analytic functions of the parameters of the theory. However, it is expected that they are not arbitrarily wild, but rath…