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Quantum controlled-not gate in the bad cavity regime

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Abstract

We propose a scheme to synthesize atom–photon hybrid controlled-not (CNOT) gate by combining atomic single-qubit operations via stimulated Raman adiabatic passage and photonic Faraday rotation in cavity QED system. Benefiting from its hybrid characteristic, we utilize atom–photon CNOT gate to construct quantum CNOT gate for remote atoms and photons, respectively. As our scheme works in the bad cavity regime and only involves virtual excitation of atoms, it may be robust against both cavity decay and atomic spontaneous emission, thus can be realized with less demanding technology than that previously mentioned.

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Acknowledgments

This work was partially supported by the National 973 Program (Grant No. 2013CB921804) and the National Science Foundation of China (Grants Nos. 11375060, 11274043, 11405052 and 11447221)

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Authors and Affiliations

  1. School of Physics, Hunan University of Science and Technology, Xiangtan, 411201, People’s Republic of China

    Zhao-Hui Peng, Yu-Qing Zhang & Xiao-Juan Liu

  2. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, Changsha, 410081, People’s Republic of China

    Le-Man Kuang

  3. School of Physics, Beijing Institute of Technology, Beijing, 100081, People’s Republic of China

    Jian Zou

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  1. Zhao-Hui Peng
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  2. Le-Man Kuang
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Correspondence to Zhao-Hui Peng.

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Peng, ZH., Kuang, LM., Zou, J. et al. Quantum controlled-not gate in the bad cavity regime. Quantum Inf Process 14, 2833–2846 (2015). https://doi.org/10.1007/s11128-015-1017-x

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