期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 26, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.260403
关键词
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资金
- Deutsche Forschungsgemeinschaft
- European Commission [IST-3-015848]
- Elite Network of Bavaria
- MunichCentre for Advanced Photonics MAP
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.
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