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Scheme for encoding single logical qubit information into three-photon decoherence-free states assisted by quantum dots

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Abstract

We propose an optical scheme to encode quantum information into three-photon decoherence-free states (single logical qubit information) and thereby acquire immunity from collective decoherence. Our scheme consists of quantum dots (QDs) within single-sided optical cavities and linearly optical devices for generation of three-photon decoherence-free states (logical qubits) and for encoding arbitrary quantum information. In our proposition, the interaction between photons and electron spin in the QD-cavity system is the critical component and plays the role of a quantum controlled operation to perform the processing of single logical qubit information with immunity against collective decoherence. Thus, we also analyze the performance of interaction between a photon and an electron in a QD. Consequently, for generating three-photon decoherence-free state encoded arbitrary quantum information, our scheme using QD-cavity systems is feasible. In practice, it could be implemented experimentally with current technologies.

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Acknowledgements

This work was supported by the ICT R&D program of MSIP/IITP[1711057505, Reliable crypto-system standards and core technology development for secure quantum key distribution network] and the R&D Convergence program of NST(National Research Council of Science and Technology) of Republic of Korea (Grant No. CAP-18-08-KRISS).

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Authors and Affiliations

  1. Base Technology Division, National Security Research Institute, P.O. Box 1, Yuseong, Daejeon, 34188, Republic of Korea

    Changho Hong & Jingak Jang

  2. College of Electrical and Computer Engineering, Chungbuk National University, Chungdae-ro 1, Seowon-Gu, Cheongju, Republic of Korea

    Jino Heo

  3. Center for Quantum Information, Korea Institute of Science and Technology (KIST), Seoul, 136-791, Republic of Korea

    Min-Sung Kang

  4. Department of Physics, Korea University, Sejong, 339-700, Republic of Korea

    Hyung-Jin Yang

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  1. Changho Hong
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Hong, C., Heo, J., Kang, MS. et al. Scheme for encoding single logical qubit information into three-photon decoherence-free states assisted by quantum dots. Quantum Inf Process 18, 216 (2019). https://doi.org/10.1007/s11128-019-2315-5

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