Quantum dense coding exploiting a bright Einstein-Podolsky-Rosen beam.
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.
Li
Xiaoying
X
State Key Laboratory of Quantum Optics and Quantum Optics Devices, Taiyuan, China.
Pan
Qing
Q
Jing
Jietai
J
Zhang
Jing
J
Xie
Changde
C
Peng
Kunchi
K