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Feedback control of quantum system

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Abstract

Feedback is a significant strategy for the control of quantum system. Information acquisition is the greatest difficulty in quantum feedback applications. After discussing several basic methods for information acquisition, we review three kinds of quantum feedback control strategies: quantum feedback control with measurement, coherent quantum feedback, and quantum feedback control based on cloning and recognition. The first feedback strategy can effectively acquire information, but it destroys the coherence in feedback loop. On the contrary, coherent quantum feedback does not destroy the coherence, but the capability of information acquisition is limited. However, the third feedback scheme gives a compromise between information acquisition and measurement disturbance.

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  1. Dong Dao-yi

    Present address: Key Laboratory of System Control, Academy of Mathematics and Systems Science, Chinese Academy of Science, Beijing, 100080, China

Authors and Affiliations

  1. Department of Automation, University of Science and Technology of China, Hefei, 230027, China

    Dong Dao-yi, Chen Zong-hai, Zhang Chen-bin & Chen Chun-lin

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  1. Dong Dao-yi
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  2. Chen Zong-hai
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  3. Zhang Chen-bin
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  4. Chen Chun-lin
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Correspondence to Chen Zong-hai.

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Dong, Dy., Chen, Zh., Zhang, Cb. et al. Feedback control of quantum system. Front. Phys. China 1, 256–262 (2006). https://doi.org/10.1007/s11467-006-0032-x

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  • DOI: https://doi.org/10.1007/s11467-006-0032-x

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