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Title: Fidelity of a Bose-Einstein condensates
Authors: Liu, J. 
Wang, W. 
Zhang, C.
Niu, Q.
Li, B. 
Issue Date: 24-Apr-2006
Citation: Liu, J., Wang, W., Zhang, C., Niu, Q., Li, B. (2006-04-24). Fidelity of a Bose-Einstein condensates. Physics Letters, Section A: General, Atomic and Solid State Physics 353 (2-3) : 216-220. ScholarBank@NUS Repository.
Abstract: We investigate fidelity for the quantum evolution of a Bose-Einstein condensate and reveal its general property with a simple model. We find the fidelity decay with time in various ways depending on the form of initial states as well as on mean-field dynamics. When the initial state is a coherent state, the fidelity decays with time in the ways of exponential, Gaussian, and power-law, having a close relation to the classical mean-field dynamics. With the initial state prepared as a maximally entangled state, we find the behavior of fidelity has no classical correspondence and observe a novel 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 Elsevier B.V. All rights reserved.
Source Title: Physics Letters, Section A: General, Atomic and Solid State Physics
ISSN: 03759601
DOI: 10.1016/j.physleta.2005.12.070
Appears in Collections:Staff Publications

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