Exact four point function for large q SYK from Regge theory

A bstract Motivated by the goal of understanding quantum systems away from maximal chaos, in this note we derive a simple closed form expression for fermion four point function large q SYK model valid at arbitrary temperatures and to leading order 1/ N . The result captures both temperature, weakly coupled regime, low nearly conformal, maximally chaotic regime model. derivation proceeds Sommerfeld-Watson resummation an infinite series that recasts as sum three Regge poles. location these poles determines Lyapunov exponent interpolates between zero value temperature is decreased. Our results are complete agreement with ones Streicher [1] obtained using different method.