On-demand superradiant conversion of atomic spin gratings into single photons with high efficiency

被引：83
|
作者：
Black, AT [1 ]
Thompson, JK
Vuletic, V
机构：
[1] MIT, Dept Phys, Harvard Ctr Ultracold Atoms, Cambridge, MA 02139 USA
[2] MIT, Elect Res Lab, Cambridge, MA 02139 USA
来源：
PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 13期
关键词：
D O I：
10.1103/PhysRevLett.95.133601
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We create quantized spin gratings by single-photon detection and convert them on demand into photons with retrieval efficiencies exceeding 40% (80%) for single ( a few) quanta. We show that the collective conversion process, proceeding via superradiant emission into a moderate-finesse optical resonator, requires phase matching. The storage time of 3 mu s in the cold-atom sample, as well as the peak retrieval efficiency, are likely limited by Doppler decoherence of the entangled state.
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页数：4
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