Universality of $SU(\infty )$ relaxation dynamics for $SU(n_f)$-symmetric spin-models

Duff Neill, Hanqing Liu

Spin-models, where the $N$ spins interact pairwise with a $SU(n_f)$ symmetry preserving hamiltonian, famously simplify in the large $n_f$, $N$ limits, as derived by Sachdev and Ye…