Erratum: Adiabatic speedup via zero-energy-change control in a spin system Li-Cheng Zhang, Feng-Hua Ren, Yi-Fei Chen, Run-Hong He, Yong-Jian Gu and Zhao-Ming Wang EPL, 125 3 (2019) 39901 Published online: 07 March 2019 DOI: 10.1209/0295-5075/125/39901