Quantum Dense Coding Exploiting a Bright Einstein-Podolsky-Rosen Beam
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- 11 January 2002
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 88 (4) , 047904
- https://doi.org/10.1103/physrevlett.88.047904
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.Keywords
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