1204.2064 (Yixiao Huang et al.)

Fisher information manifestation of dynamical stability and transition
to self-trapping for Bose-Einstein condensates    [PDF]

Yixiao Huang, Wei Zhong, Zhe Sun, Xiaoguang Wang

We investigate dynamical stability and self-trapping for Bose-Einstein condensates in a symmetric double well. The relation between the quantum Fisher information and the stability of the fixed point is studied. We find that the quantum Fisher information displays a sharp transition as the fixed point evolving from stable to unstable regime. Moreover, the transition from Josephson oscillation to self-trapping is accompanied by an abrupt change of the quantum Fisher information.

View original: http://arxiv.org/abs/1204.2064