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Quantum estimation of detection efficiency with no-knowledge quantum feedback |
Dong Xie(谢东), Chunling Xu(徐春玲) |
Faculty of Science, Guilin University of Aerospace Technology, Guilin 541004, China |
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Abstract We investigate that no-knowledge measurement-based feedback control is utilized to obtain the estimation precision of the detection efficiency. We show that no-knowledge measurement is the optimal way to estimate the detection efficiency. The higher precision can be achieved for the lower or larger detection efficiency. It is found that no-knowledge feedback can be used to cancel decoherence. No-knowledge feedback with a high detection efficiency can perform well in estimating frequency and detection efficiency parameters simultaneously; simultaneous estimation is better than independent estimation given by the same probes.
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Received: 06 December 2017
Revised: 25 March 2018
Accepted manuscript online:
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PACS:
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03.65.Yz
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(Decoherence; open systems; quantum statistical methods)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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42.50.Pq
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(Cavity quantum electrodynamics; micromasers)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No.11747008) and the Natural Science Foundation of Guangxi Zhuang Autonomous Region,China (Grant No.2016GXNSFBA380227). |
Corresponding Authors:
Dong Xie
E-mail: txs.xiedong@mail.ustc.edu.cn
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Cite this article:
Dong Xie(谢东), Chunling Xu(徐春玲) Quantum estimation of detection efficiency with no-knowledge quantum feedback 2018 Chin. Phys. B 27 060303
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