Experimental demonstration of a quantum router

X. X. Yuan; J. J. Ma; P. Y. Hou; X. Y. Chang; C. Zu; L. M. Duan

doi:10.1038/srep12452

Experimental demonstration of a quantum router

X. X. Yuan
, J. J. Ma
, P. Y. Hou
, X. Y. Chang
, C. Zu
, L. M. Duan

Department of Physics

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

52 Scopus citations

Abstract

The router is a key element for a network. We describe a scheme to realize genuine quantum routing of single-photon pulses based on cascading of conditional quantum gates in a Mach-Zehnder interferometer and report a proof-of-principle experiment for its demonstration using linear optics quantum gates. The polarization of the control photon routes in a coherent way the path of the signal photon while preserving the qubit state of the signal photon represented by its polarization. We demonstrate quantum nature of this router by showing entanglement generated between the initially unentangled control and signal photons, and confirm that the qubit state of the signal photon is well preserved by the router through quantum process tomography.

Original language	English
Article number	12452
Journal	Scientific reports
Volume	5
DOIs	https://doi.org/10.1038/srep12452
State	Published - Jul 22 2015

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AU - Ma, J. J.

AU - Hou, P. Y.

AU - Chang, X. Y.

AU - Zu, C.

AU - Duan, L. M.

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AB - The router is a key element for a network. We describe a scheme to realize genuine quantum routing of single-photon pulses based on cascading of conditional quantum gates in a Mach-Zehnder interferometer and report a proof-of-principle experiment for its demonstration using linear optics quantum gates. The polarization of the control photon routes in a coherent way the path of the signal photon while preserving the qubit state of the signal photon represented by its polarization. We demonstrate quantum nature of this router by showing entanglement generated between the initially unentangled control and signal photons, and confirm that the qubit state of the signal photon is well preserved by the router through quantum process tomography.

UR - https://www.scopus.com/pages/publications/84937484954

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Experimental demonstration of a quantum router

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