Experimental Realization of Entanglement Concentration and a Quantum Repeater

Zhi Zhao; Tao Yang; Yu Ao Chen; An Ning Zhang; Jian Wei Pan

doi:10.1103/PhysRevLett.90.207901

Experimental Realization of Entanglement Concentration and a Quantum Repeater

Zhi Zhao
, Tao Yang
, Yu Ao Chen
, An Ning Zhang
, Jian Wei Pan

University of Science and Technology of China
University of Vienna

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

We report an experimental realization of entanglement concentration using two polarization-entangled photon pairs produced by pulsed parametric down-conversion. In the meantime, our setup also provides a proof-in-principle demonstration of a quantum repeater. The quality of our procedure is verified by observing a violation of Bell’s inequality by more than 5 standard deviations. The high experimental accuracy achieved in the experiment implies that the requirement of tolerable error rate in multistage realization of quantum repeaters can be fulfilled, hence providing a useful toolbox for quantum communication over large distances.

Original language	English
Pages (from-to)	4
Number of pages	1
Journal	Physical Review Letters
Volume	90
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.90.207901
Publication status	Published - 2003
Externally published	Yes

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10.1103/PhysRevLett.90.207901

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AU - Chen, Yu Ao

AU - Zhang, An Ning

AU - Pan, Jian Wei

PY - 2003

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AB - We report an experimental realization of entanglement concentration using two polarization-entangled photon pairs produced by pulsed parametric down-conversion. In the meantime, our setup also provides a proof-in-principle demonstration of a quantum repeater. The quality of our procedure is verified by observing a violation of Bell’s inequality by more than 5 standard deviations. The high experimental accuracy achieved in the experiment implies that the requirement of tolerable error rate in multistage realization of quantum repeaters can be fulfilled, hence providing a useful toolbox for quantum communication over large distances.

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Experimental Realization of Entanglement Concentration and a Quantum Repeater

Abstract

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