title: Experimental demonstration of probabilistic quantum cloning.
abstract: The method of quantum cloning is divided into two main categories: approximate and probabilistic quantum cloning. The former method is used to approximate an unknown quantum state deterministically, and the latter can be used to faithfully copy the state probabilistically. Thus far, many approximate cloning machines have been experimentally demonstrated, but probabilistic cloning remains an experimental challenge, as it requires more complicated networks and a higher level of precision control. In this work, we design an efficient quantum network with a limited amount of resources and perform the first experimental demonstration of probabilistic quantum cloning in a NMR quantum computer. In our experiment, the optimal cloning efficiency proposed by Duan and Guo [Phys. Rev. Lett. 80, 4999 (1998)] is achieved.
authors.affiliation: Hefei National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui, People’s Republic of China.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Chen
authors.forename: Dawei
authors.initials: D
authors.lastname: Lu
authors.forename: Bo
authors.initials: B
authors.lastname: Chong
authors.forename: Gan
authors.initials: G
authors.lastname: Qin
authors.forename: Xianyi
authors.initials: X
authors.lastname: Zhou
authors.forename: Xinhua
authors.initials: X
authors.lastname: Peng
authors.forename: Jiangfeng
authors.initials: J
authors.lastname: Du