Experimental demonstration of a quantum router

被引：44
|
作者：
Yuan, X. X. [1 ]
Ma, J. -J. [1 ]
Hou, P. -Y. [1 ]
Chang, X. -Y. [1 ]
Zu, C. [1 ]
Duan, L. -M. [1 ,2 ]
机构：
[1] Tsinghua Univ, IIIS, Ctr Quantum Informat, Beijing 100084, Peoples R China
[2] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
来源：
SCIENTIFIC REPORTS | 2015年 / 5卷
关键词：
PHOTONS; SWITCH; ATOM;
D O I：
10.1038/srep12452
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
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.
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页数：9
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