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- W4318620906 abstract "In this paper, we investigate the uniform exponential stability of a semi-discrete scheme for a Schr{o}dinger equation under boundary feedback stabilizing control in the natural state space $L^2(0,1)$. This study is significant since a time domain energy multiplier that allows proving the exponential stability of this continuous Schr{o}dinger system has not yet found, thus leading to a major mathematical challenge to semi-discretization of the PDE, an open problem for a long time. Although the powerful frequency domain energy multiplier approach has been used in proving exponential stability for PDEs since 1980s, its use to the emph{uniform} exponential stability of the semi-discrete scheme for PDEs has not been reported yet. The difficulty associated with the uniformity is that due to the parameter of the step size, it involves a family of operators in different state spaces that need to be considered simultaneously. Based on the Huang-Pr{u}ss frequency domain criterion for uniform exponential stability of a family of $C_0$-semigroups in Hilbert spaces, we solve this problem for the first time by proving the uniform boundedness for all the resolvents of these operators on the imaginary axis. The proof almost exactly follows the procedure for the exponential stability of the continuous counterpart, highlighting the advantage of this discretization method." @default.
- W4318620906 created "2023-01-31" @default.
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- W4318620906 date "2023-01-27" @default.
- W4318620906 modified "2023-09-28" @default.
- W4318620906 title "Frequency Energy Multiplier Approach to Uniform Exponential Stability Analysis of Semi-discrete Scheme for a Schrodinger Equation under Boundary Feedback" @default.
- W4318620906 doi "https://doi.org/10.48550/arxiv.2301.11649" @default.
- W4318620906 hasPublicationYear "2023" @default.
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