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Quantum Speed Limit Time of a Two-Level Atom under Homodyne-Mediated Feedback and Classical Driving

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Abstract

We study the QSLT of the two-level system coupling to a single mode cavity which is driven by a laser field under the feedback control, and focus on the effect of the Rabi frequency and two types of the feedback on the QSLT. The results show that the QSLT is always less than the driving time, that is, the evolution speed of the two-level system can be accelerated. Whatever types of feedback we use, the QSLT varies with the initial time parameter, both the feedback and the classical field can change the acceleration in the evolution process.

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Acknowledgments

This work has been financially supported by NSFC (Grant Nos. U1204616, 11804141), The Training Plan of Young Key Teachers in Colleges and Universities of Henan Province (Nos. 2018GGJS129, 2017GGJS137).

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Authors and Affiliations

  1. College of Physics and Electronic Information & Henan Key Laboratory of Electromagnetic Transformation and Detection, Luoyang Normal University, Luoyang, 471934, China

    Hai-Feng Yang, Yong-Gang Tan, Lei-Ming Cao & Yao-Hua Hu

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  1. Hai-Feng Yang
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  2. Yong-Gang Tan
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  4. Yao-Hua Hu
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Yang, HF., Tan, YG., Cao, LM. et al. Quantum Speed Limit Time of a Two-Level Atom under Homodyne-Mediated Feedback and Classical Driving. Int J Theor Phys 60, 4135–4144 (2021). https://doi.org/10.1007/s10773-021-04964-0

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