High-fidelity teleportation beyond the no-cloning limit and entanglement swapping for continuous variables

被引：226

作者：

Takei, N

Yonezawa, H

Aoki, T

Furusawa, A

机构：

[1] Univ Tokyo, Sch Engn, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[2] Japan Sci & Technol Agcy, CREST, Chuo Ku, Tokyo 1030028, Japan

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.94.220502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We experimentally demonstrate continuous-variable quantum teleportation beyond the no-cloning limit. We teleport a coherent state and achieve the fidelity of 0.70 +/- 0.02 that surpasses the no-cloning limit of 2/3. Surpassing the limit is necessary to transfer the nonclassicality of an input quantum state. By using our high-fidelity teleporter, we demonstrate entanglement swapping, namely, teleportation of quantum entanglement, as an example of transfer of nonclassicality.

引用

页数：4

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