Quantum-dynamical phase transition and Fisher information in a non-Hermitian Bose-Hubbard dimer Yixiao Huang, Heng-Na Xiong, Wei Zhong, Zheng-Da Hu and En-Jia Ye EPL, 114 2 (2016) 20002 Published online: 09 May 2016 DOI: 10.1209/0295-5075/114/20002