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Quantum communication between atomic ensembles using coherent light

Lu-Ming Duan·J. I. Cirac·P. Zoller·E. S. Polzik
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Abstract

Protocols for quantum communication between massive particles, such as atoms, are usually based on transmitting nonclassical light, and/or super-high finesse optical cavities are normally needed to enhance interaction between atoms and photons. We demonstrate a surprising result: an unknown quantum state can be teleported from one free-space atomic ensemble to the other by transmitting only coherent light. No non-classical light and no cavities are needed in the scheme, which greatly simplifies its experimental implementation.

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Lu-Ming Duan, J. I. Cirac, P. Zoller, E. S. Polzik. 2000-03-23. Quantum communication between atomic ensembles using coherent light. https://doi.org/10.1103/physrevlett.85.5643

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