期刊
PHYSICAL REVIEW LETTERS
卷 106, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.053602
关键词
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资金
- Spanish Ministry of Science and Innovation [FIS2008-01051]
- ICFO-OCE
- Commission for Universities and Research of the Department of Innovation, Universities and Enterprises of the Catalan Government
- European Social Fund
We demonstrate the generation of rubidium-resonant heralded single photons for quantum memories. Photon pairs are created by cavity-enhanced down-conversion and narrowed in bandwidth to 7 MHz with a novel atom-based filter operating by interaction-free measurement principles. At least 94% of the heralded photons are atom-resonant as demonstrated by a direct absorption measurement with rubidium vapor. A heralded autocorrelation measurement shows g(c)((2))(0) = 0.040 +/- 0.012, i.e., suppression of multiphoton contributions by a factor of 25 relative to a coherent state. The generated heralded photons can readily be used in quantum memories and quantum networks.
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