Quantum Dense Coding Exploiting a Bright Einstein-Podolsky-Rosen Beam

Xiaoying Li, Qing Pan, Jietai Jing, Jing Zhang, Changde Xie, and Kunchi Peng
Phys. Rev. Lett. 88, 047904 – Published 11 January 2002
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Abstract

Highly efficient quantum dense coding for continuous variables has been experimentally accomplished by means of exploiting a bright Einstein-Podolsky-Rosen (EPR) beam with anticorrelation of amplitude quadratures and correlation of phase quadratures. Two bits of classical information are encoded on two quadratures of a half of a bright EPR beam, then are simultaneously decoded by the other half of the EPR beam with the sensitivities beyond that of the shot noise limit. A high degree of immunity to unauthorized eavesdropping has been experimentally demonstrated.

  • Received 18 July 2001

DOI:https://doi.org/10.1103/PhysRevLett.88.047904

©2002 American Physical Society

Authors & Affiliations

Xiaoying Li, Qing Pan, Jietai Jing, Jing Zhang, Changde Xie, and Kunchi Peng*

  • State Key Laboratory of Quantum Optics and Quantum Optics Devices, Taiyuan, China
  • and Institute of Opto-Electronics, Shanxi University, Taiyuan, 030006, People's Republic of China

  • *Email address: kcpeng@sxu.edu.cn

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Issue

Vol. 88, Iss. 4 — 28 January 2002

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