Sensitivity Analysis of Cascaded Quantum Feedback Amplifier

Yu Yokotera; Naoki Yamamoto

doi:10.1109/LCSYS.2018.2862620

Sensitivity Analysis of Cascaded Quantum Feedback Amplifier

Yu Yokotera, Naoki Yamamoto

Department of Applied Physics and Physico-Informatics

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Quantum amplifier is an essential device in quantum information processing. As in the classical (non-quantum) case, its characteristic uncertainty needs to be suppressed by feedback, and in fact such a control theory for a single quantum amplifier has recently been developed. This letter extends this result to the case of cascaded quantum amplifier. In particular, we consider two types of structures: the case where controlled amplifiers are connected in series, and the case where a single feedback control is applied to the cascaded amplifier. Then, we prove that the latter is better in the sense of sensitivity to the uncertainty. A detailed numerical simulation is given to show actual performance of these two feedback schemes.

Original language	English
Article number	8424461
Pages (from-to)	156-161
Number of pages	6
Journal	IEEE Control Systems Letters
Volume	3
Issue number	1
DOIs	https://doi.org/10.1109/LCSYS.2018.2862620
Publication status	Published - 2019 Jan

Keywords

Quantum information and control
robust control
stability of linear systems

ASJC Scopus subject areas

Control and Systems Engineering
Control and Optimization

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10.1109/LCSYS.2018.2862620

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title = "Sensitivity Analysis of Cascaded Quantum Feedback Amplifier",

abstract = "Quantum amplifier is an essential device in quantum information processing. As in the classical (non-quantum) case, its characteristic uncertainty needs to be suppressed by feedback, and in fact such a control theory for a single quantum amplifier has recently been developed. This letter extends this result to the case of cascaded quantum amplifier. In particular, we consider two types of structures: the case where controlled amplifiers are connected in series, and the case where a single feedback control is applied to the cascaded amplifier. Then, we prove that the latter is better in the sense of sensitivity to the uncertainty. A detailed numerical simulation is given to show actual performance of these two feedback schemes.",

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author = "Yu Yokotera and Naoki Yamamoto",

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AB - Quantum amplifier is an essential device in quantum information processing. As in the classical (non-quantum) case, its characteristic uncertainty needs to be suppressed by feedback, and in fact such a control theory for a single quantum amplifier has recently been developed. This letter extends this result to the case of cascaded quantum amplifier. In particular, we consider two types of structures: the case where controlled amplifiers are connected in series, and the case where a single feedback control is applied to the cascaded amplifier. Then, we prove that the latter is better in the sense of sensitivity to the uncertainty. A detailed numerical simulation is given to show actual performance of these two feedback schemes.

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KW - stability of linear systems

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Sensitivity Analysis of Cascaded Quantum Feedback Amplifier

Abstract

Keywords

ASJC Scopus subject areas

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