2011年5月6日，我室量子物理与量子信息研究部杜江峰教授研究组与兄弟院校合作在PRL上发表题为Experimental Demonstration of Probabilistic Quantum Cloning的论文。

Source: PHYSICAL REVIEW LETTERS Volume: 106 Issue: 18 Article Number: 180404 Published: MAY 6 2011
Chen HW (Chen, Hongwei)1,2,3, Lu DW (Lu, Dawei)1,2, Chong B (Chong, Bo)1,2,4, Qin G (Qin, Gan)1,2, Zhou XY (Zhou, Xianyi)1,2, Peng XH (Peng, Xinhua)1,2, Du JF (Du, Jiangfeng)1,2
Addresses:
1. Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui Peoples R China
2. Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui Peoples R China
3. Chinese Acad Sci, Hefei Inst Phys Sci, High Field Magnet Lab, Hefei 230031, Peoples R China
4. Xian Univ Architecture & Technol, Coll Sci, Xian 710055, Peoples R China
E-mail Addresses: xhpeng@ustc.edu.cn, djf@ustc.edu.cn

Reprint Address: Chen, HW (reprint author), Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui Peoples R China

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.