Letter abstract


Nature Photonics 4, 376 - 381 (2010)
Published online: 16 May 2010 | doi:10.1038/nphoton.2010.87

Subject Category: Quantum optics

Experimental free-space quantum teleportation

Xian-Min Jin1, Ji-Gang Ren1,2,3, Bin Yang1, Zhen-Huan Yi2, Fei Zhou2, Xiao-Fan Xu1, Shao-Kai Wang2, Dong Yang2, Yuan-Feng Hu1, Shuo Jiang2, Tao Yang1, Hao Yin1, Kai Chen1, Cheng-Zhi Peng2 & Jian-Wei Pan1,2


Quantum teleportation1 is central to the practical realization of quantum communication2, 3. Although the first proof-of-principle demonstration was reported in 1997 by the Innsbruck4 and Rome groups5, long-distance teleportation has so far only been realized in fibre with lengths of hundreds of metres6, 7. An optical free-space link is highly desirable for extending the transfer distance, because of its low atmospheric absorption for certain ranges of wavelength. By following the Rome scheme5, which allows a full Bell-state measurement, we report free-space implementation of quantum teleportation over 16 km. An active feed-forward technique has been developed to enable real-time information transfer. An average fidelity of 89%, well beyond the classical limit of 2/3, is achieved. Our experiment has realized all of the non-local aspects of the original teleportation scheme and is equivalent to it up to a local unitary operation5. Our result confirms the feasibility of space-based experiments, and is an important step towards quantum-communication applications on a global scale.

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  1. Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui, 230026, PR China
  2. Physics Department, Tsinghua University, Beijing 100084, PR China
  3. These authors contributed equally to this work.

Correspondence to: Cheng-Zhi Peng2 e-mail: pcz@mail.tsinghua.edu.cn

Correspondence to: Jian-Wei Pan1,2 e-mail: pan@ustc.edu.cn



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