Experimental quantum cloning with prior partial information.
When prior partial information about a state to be cloned is available, it can be cloned with a fidelity higher than that of universal quantum cloning. We experimentally verify this intriguing relationship between the cloning fidelity and the prior information by reporting the first experimental optimal quantum state-dependent cloner, using nuclear magnetic resonance techniques. Our experiments may further cast important implications into many quantum information processing protocols.
Du
Jiangfeng
J
Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China. djf@ustc.edu.cn
Durt
Thomas
T
Zou
Ping
P
Li
Hui
H
Kwek
L C
LC
Lai
C H
CH
Oh
C H
CH
Ekert
Artur
A