Floquet modulation of symmetry in an atomic Bose-Josephson junction Honghua Zhong, Bo Zhu, Xizhou Qin, Jiahao Huang, Yongguan Ke, Zheng Zhou and Chaohong Lee Eur. Phys. J. D, 70 7 (2016) 157 Published online: 20 July 2016 DOI: 10.1140/epjd/e2016-70240-4