title: Experimental quantum cloning with prior partial information.
abstract: 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.
authors.affiliation: 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
authors.forename: Jiangfeng
authors.initials: J
authors.lastname: Du
authors.forename: Thomas
authors.initials: T
authors.lastname: Durt
authors.forename: Ping
authors.initials: P
authors.lastname: Zou
authors.forename: Hui
authors.initials: H
authors.lastname: Li
authors.forename: L C
authors.initials: LC
authors.lastname: Kwek
authors.forename: C H
authors.initials: CH
authors.lastname: Lai
authors.forename: C H
authors.initials: CH
authors.lastname: Oh
authors.forename: Artur
authors.initials: A
authors.lastname: Ekert