Towards Long-Distance Atom-Photon Entanglement

被引：49

作者：

Rosenfeld, W. ^{[1
]}

Hocke, F. ^{[1
]}

Henkel, F. ^{[1
]}

Krug, M. ^{[1
]}

Volz, J. ^{[1
]}

Weber, M. ^{[1
]}

Weinfurter, H. ^{[1
,2
]}

机构：

[1] Univ Munich, Fak Phys, D-80799 Munich, Germany

[2] Max Planck Inst Quantum Opt, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.101.260403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the observation of entanglement between a single trapped atom and a single photon at remote locations. The degree of coherence of the entangled atom-photon pair is verified via appropriate local correlation measurements, after communicating the photon via an optical fiber link of 300 m length to a receiver 3.5 m apart. In addition, we measured the temporal evolution of the atomic density matrix after projecting the atom via a state measurement of the photon onto several well-defined spin states. We find that the state of the single atom dephases on a time scale of 150 mu s, which represents an important step towards long-distance quantum networking with individual neutral atoms.

引用

页数：4

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