Fisher information manifestation of dynamical stability and transition to self-trapping for Bose-Einstein condensates
arXiv:1204.2064 · doi:10.1103/PhysRevA.86.012320
Abstract
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.
7 pages, 5 figures
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