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期刊论文
Quantum Dense Coding Exploiting a Bright Einstein-Podolsky-Rosen Beam
PHYS ICAL RE V IEW LETTERS VOLUME 88, NUMBER 4 28 JANUARY 2002，-0001，（）：
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.
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