Largecharge

Introduction to the large charge expansion

Working in sectors of large global charge leads to important simplifications when studying strongly coupled CFTs. In this talk I will introduce the large-charge expansion via the simple example of the O(2) model and apply it in a number of other …

S-duality and correlation functions at large R-charge

We study the ratio of pairs of adjacent correlators of Coulomb-branch operators in SU(2) N=2 SQCD with four flavors within the framework of the Large Quantum Number Expansion. Capitalizing on the order-by-order S-duality invariance of the …

Charging the Conformal Window

We investigate the properties of near-conformal dynamics in a sector of large charge when approaching the lower boundary of the conformal window from the chirally broken phase. To elucidate our approach we use the time-honored example of the …

Introduction to the large charge expansion

I will present the large-charge construction and some examples of applications to vector models and supersymmetric models

Introduction to the large charge expansion

I will present the large-charge construction for CFT with isolated vacua.

Tame the beast: physics at strong coupling

Strong coupling cannot be avoided in the description of physical systems. I propose a definition based on the path integral formalism, quickly review some approaches for strongly-coupled systems and propose a notion of local strong coupling, where …

A large charge to tame strong coupling

I will present the large-charge construction for CFT with isolated vacua and discuss its application to asymptotically safe theories and an effective model of walking dynamics.

Near-Conformal Dynamics at Large Charge

We investigate four-dimensional near-conformal dynamics by means of the large-charge limit. We first introduce and justify the formalism in which near-conformal invariance is insured by adding a dilaton and then determine the large-charge spectrum of …

Large charge at large N

We apply the large-charge expansion to O(N) vector models starting from first principles, focusing on the Wilson-Fisher point in three dimensions. We compute conformal dimensions at zero and finite temperature at fixed charge Q, concentrating on the …

Large charge at large N

We apply the large-charge expansion to O(N) vector models starting from first principles. We focus on the Wilson–Fisher point in three dimensions. We compute conformal dimensions and energies on generic Riemann surfaces at zero and finite …