State transfer of nS ultracold Rydberg atoms in external electric fields Jie Chen, Hao Zhang, Limei Wang, Shanxia Bao, Linjie Zhang, Changyong Li, Jianming Zhao and Suotang Jia Eur. Phys. J. D, 68 9 (2014) 265 Published online: 25 September 2014 DOI: 10.1140/epjd/e2014-40605-x