Similar Early Growth of Out-of-time-ordered Correlators in Quantum Chaotic and Integrable Ising Chains *

Hua Yan,Jiao-Zi Wang,Wen-Ge Wang

Fig. 4 (Color online) Comparison of early growths of OTOC in integrable and nonintegrable (chaotic) systems, for $(W_l, V_0) =(\sigma_l^z,\sigma_0^z)$ and $(\sigma_l^x,\sigma_0^x)$ with $l=5$. (a): open boundary condition, and (b): periodic boundary condition.