Experimental demonstration of a BDCZ quantum repeater node

Zhen-Sheng Yuan, Yu-Ao Chen (), Bo Zhao, Shuai Chen, Jörg Schmiedmayer and Jian-Wei Pan ()
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Zhen-Sheng Yuan: Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany
Yu-Ao Chen: Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany
Bo Zhao: Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany
Shuai Chen: Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany
Jörg Schmiedmayer: Atominstitut der Österreichischen Universitäten, TU-Wien, A-1020 Vienna, Austria
Jian-Wei Pan: Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany

Nature, 2008, vol. 454, issue 7208, 1098-1101

Abstract: Quantum communication: repeat performance At distances beyond about 100 km, quantum communication fails due to photon losses in the transmission channel. To overcome this problem, Briegel, Dür, Cirac and Zoller (BDCZ) introduced the concept of quantum repeaters, combining entanglement swapping and quantum memory to efficiently extend the achievable distances. Their implementation has proved challenging due to the difficulty of integrating a quantum memory. Zhen-ShengYuan et al. realize a building block of the BDCZ quantum repeater, demonstrating entanglement swapping with storage and retrieval of light from atomic quantum memories.

Date: 2008
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DOI: 10.1038/nature07241

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