NMR Experimental Demonstration of Probabilistic Quantum Cloning

Details NMR Experimental Demonstration of Probabilistic Quantum Cloning NMR Experimental Demonstration of Probabilistic Quantum Cloning

2011-04-19

arxiv.org/abs/1104.3643v1

Phys. Rev. Lett. 106, 180404 (2011)

Physics

Quantum Physics

4 pages, 5 figures; to be published in Physical Review Letters

Scientific paper

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. So 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 designed an efficient quantum network with a limited amount of resources, and performed the first experimental demonstration of probabilistic quantum cloning in an NMR quantum computer. In our experiment, the optimal cloning efficiency proposed by Duan and Guo [Phys. Rev. Lett. \textbf{80}, 4999 (1998)] is achieved.

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