Please use this identifier to cite or link to this item:
https://doi.org/10.1103/PhysRevA.72.063623
Title: | Fidelity for the quantum evolution of a Bose-Einstein condensate | Authors: | Liu, J. Wang, W. Zhang, C. Niu, Q. Li, B. |
Issue Date: | Dec-2005 | Citation: | Liu, J., Wang, W., Zhang, C., Niu, Q., Li, B. (2005-12). Fidelity for the quantum evolution of a Bose-Einstein condensate. Physical Review A - Atomic, Molecular, and Optical Physics 72 (6) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.72.063623 | Abstract: | We investigate fidelity for the quantum evolution of a Bose-Einstein condensate (BEC) and reveal its general property with a simple two-component BEC model. We find that, when the initial state is a coherent state, the fidelity decays with time in the ways of exponential, Gaussian, and power law, depending on the initial location, the perturbation strength, as well as the underlying mean-field classical dynamics. In this case we find a clear correspondence between the fast quantum fidelity decay and the dynamical instability of the mean-field system. With the initial state prepared as a maximally entangled state, we find that the behavior of fidelity has no classical correspondence and observe an interesting behavior of the fidelity: periodic revival, where the period is inversely proportional to the number of bosons and the perturbation strength. An experimental observation of the fidelity decay is suggested. © 2005 The American Physical Society. | Source Title: | Physical Review A - Atomic, Molecular, and Optical Physics | URI: | http://scholarbank.nus.edu.sg/handle/10635/96624 | ISSN: | 10502947 | DOI: | 10.1103/PhysRevA.72.063623 |
Appears in Collections: | Staff Publications |
Show full item record
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.