Functional Quantum Nodes for Entanglement Distribution over Scalable Quantum Networks | Zendy

C. W. Chou | Zendy; Julien Laurat | Zendy; Hui Deng | Zendy; K. S. Choi | Zendy; Hugues de Riedmatten | Zendy; D. Felinto | Zendy; H. J. Kimble | Zendy

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Functional Quantum Nodes for Entanglement Distribution over Scalable Quantum Networks

Author(s) -

C. W. Chou,

Julien Laurat,

Hui Deng,

K. S. Choi,

Hugues de Riedmatten,

D. Felinto,

H. J. Kimble

Publication year - 2007

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.1140300

Subject(s) - quantum entanglement , quantum network , quantum cryptography , quantum sensor , quantum information science , physics , quantum key distribution , quantum channel , quantum teleportation , quantum mechanics , w state , quantum capacity , quantum technology , bell state , computer science , quantum , quantum information , open quantum system

We demonstrated entanglement distribution between two remote quantum nodes located 3 meters apart. This distribution involves the asynchronous preparation of two pairs of atomic memories and the coherent mapping of stored atomic states into light fields in an effective state of near-maximum polarization entanglement. Entanglement is verified by way of the measured violation of a Bell inequality, and it can be used for communication protocols such as quantum cryptography. The demonstrated quantum nodes and channels can be used as segments of a quantum repeater, providing an essential tool for robust long-distance quantum communication.

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