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High-fidelity photonic quantum logic gate based on near-optimal Rydberg single-photon source

Author

Listed:
  • Shuai Shi

    (Huazhong University of Science and Technology)

  • Biao Xu

    (Huazhong University of Science and Technology)

  • Kuan Zhang

    (Huazhong University of Science and Technology)

  • Gen-Sheng Ye

    (Huazhong University of Science and Technology)

  • De-Sheng Xiang

    (Huazhong University of Science and Technology)

  • Yubao Liu

    (Huazhong University of Science and Technology)

  • Jingzhi Wang

    (Huazhong University of Science and Technology)

  • Daiqin Su

    (Huazhong University of Science and Technology)

  • Lin Li

    (Huazhong University of Science and Technology)

Abstract

Compared to other types of qubits, photon is one of a kind due to its unparalleled advantages in long-distance quantum information exchange. Therefore, photon is a natural candidate for building a large-scale, modular optical quantum computer operating at room temperature. However, low-fidelity two-photon quantum logic gates and their probabilistic nature result in a large resource overhead for fault tolerant quantum computation. While the probabilistic problem can, in principle, be solved by employing multiplexing and error correction, the fidelity of linear-optical quantum logic gate is limited by the imperfections of single photons. Here, we report the demonstration of a linear-optical quantum logic gate with truth table fidelity of 99.84(3)% and entangling gate fidelity of 99.69(4)% post-selected upon the detection of photons. The achieved high gate fidelities are made possible by our near-optimal Rydberg single-photon source. Our work paves the way for scalable photonic quantum applications based on near-optimal single-photon qubits and photon-photon gates.

Suggested Citation

  • Shuai Shi & Biao Xu & Kuan Zhang & Gen-Sheng Ye & De-Sheng Xiang & Yubao Liu & Jingzhi Wang & Daiqin Su & Lin Li, 2022. "High-fidelity photonic quantum logic gate based on near-optimal Rydberg single-photon source," Nature Communications, Nature, vol. 13(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-32083-9
    DOI: 10.1038/s41467-022-32083-9
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    References listed on IDEAS

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