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Probabilistic cloning of a single-atom state via cavity QED

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Abstract

We propose a scheme for probabilistically cloning a two-level state of an atom to a polarization photon via cavity QED system combined with linear optics elements. By choosing appropriate parameters, a controlled phase flip (CPF) gate between the atom and the probe photon is realized. Then we can judge that the cloning process should be continued (with the optimal probability) or interrupted by detecting the probe photon. If the cloning can be continued, the original atom state is deterministically cloned to the cloning photon by performing two more CPF gates and three single-qubit unitary operations. Otherwise, if the detection shows that the cloning should be interrupted, the cloning photon and the relevant operations are omitted.

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Acknowledgments

We are grateful to the editor and the anonymous reviewers for their helpful suggestions. This work is supported by the 211 Project of Anhui University, the Natural Science Foundation of Anhui University (KJQN1104), the National Science Foundation of China (11374013) and the Anhui Provincial Natural Science Foundation (1408085QF127).

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Authors and Affiliations

  1. Key Laboratory of Optoelectronic Information Acquisition & Manipulation of Ministry of Education of China, School of Physics & Material Science, Anhui University, Hefei, 230601, China

    Wen Zhang, Yan Lu & Qun Yang

  2. Anhui Xinhua University, Hefei, 230088, China

    Pinshu Rui

  3. Department of Physics, Anhui Medical University, Hefei, 230032, China

    Yan Zhao

Authors
  1. Wen Zhang
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  2. Pinshu Rui
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  3. Yan Lu
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  4. Qun Yang
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  5. Yan Zhao
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Correspondence to Wen Zhang.

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Zhang, W., Rui, P., Lu, Y. et al. Probabilistic cloning of a single-atom state via cavity QED. Quantum Inf Process 14, 2271–2280 (2015). https://doi.org/10.1007/s11128-015-0968-2

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  • DOI: https://doi.org/10.1007/s11128-015-0968-2

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