NMR Experimental Demonstration of Probabilistic Quantum Cloning

TL;DR

This paper reports the first experimental demonstration of probabilistic quantum cloning using NMR technology, achieving optimal cloning efficiency with a resource-efficient quantum network.

Contribution

It presents the design and implementation of an efficient quantum network for probabilistic cloning, overcoming previous experimental challenges.

Findings

Achieved optimal cloning efficiency as proposed by Duan and Guo

Demonstrated probabilistic quantum cloning in an NMR quantum computer

Developed a resource-efficient quantum network for 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. 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.