2017年3月
Implementation of a quantum controlled-SWAP gate with photonic circuits
SCIENTIFIC REPORTS
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- 巻
- 7
- 号
- 開始ページ
- 45353
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1038/srep45353
- 出版者・発行元
- NATURE PUBLISHING GROUP
Quantum information science addresses how the processing and transmission of information are affected by uniquely quantum mechanical phenomena. Combination of two-qubit gates has been used to realize quantum circuits, however, scalability is becoming a critical problem. The use of three-qubit gates may simplify the structure of quantum circuits dramatically. Among them, the controlled-SWAP (Fredkin) gates are essential since they can be directly applied to important protocols, e. g., error correction, fingerprinting, and optimal cloning. Here we report a realization of the Fredkin gate for photonic qubits. We achieve a fidelity of 0.85 in the computational basis and an output state fidelity of 0.81 for a 3-photon Greenberger-Horne-Zeilinger state. The estimated process fidelity of 0.77 indicates that our Fredkin gate can be applied to various quantum tasks.
- リンク情報
- ID情報
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- DOI : 10.1038/srep45353
- ISSN : 2045-2322
- PubMed ID : 28361950
- Web of Science ID : WOS:000397965900001