Kavli Affiliate: Debanjan Chowdhury | First 5 Authors: Debanjan Chowdhury, Brian Swingle, , , | Summary: The growth of commutators of initially commuting local operators diagnoses the onset of chaos in quantum many-body systems. We compute such commutators of local field operators with $N$ components in the $(2+1)$-dimensional $O(N)$ nonlinear sigma model to leading order […]