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Title: An implicit Lyapunov control for finite-dimensional closed quantum systems
Authors: Zhao, S.
Lin, H. 
Sun, J.
Xue, Z.
Keywords: LaSalle invariance principle
Lyapunov control
quantum system
Issue Date: 25-Jul-2012
Citation: Zhao, S., Lin, H., Sun, J., Xue, Z. (2012-07-25). An implicit Lyapunov control for finite-dimensional closed quantum systems. International Journal of Robust and Nonlinear Control 22 (11) : 1212-1228. ScholarBank@NUS Repository.
Abstract: In this paper, the state convergence problem for closed quantum systems is investigated. We consider two degenerate cases, where the internal Hamiltonian of the system is not strongly regular or the linearized system around the target state is not controllable. Both the cases are closely related to practical systems such as one-dimensional oscillators and coupled two spin systems. An implicit Lyapunov-based control strategy is adopted for the convergence analysis. In particular, two kinds of Lyapunov functions are defined by implicit functions and their existences are guaranteed by a fixed point theorem. The convergence analysis is investigated by the LaSalle invariance principle for both cases. Moreover, the two Lyapunov functions are unified in a general form, and the characterization of the largest invariant set is presented. Finally, simulation studies are included to show the effectiveness and advantage of the proposed methods. Copyright © 2011 John Wiley & Sons, Ltd.
Source Title: International Journal of Robust and Nonlinear Control
ISSN: 10498923
DOI: 10.1002/rnc.1748
Appears in Collections:Staff Publications

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