Atom-Resonant Heralded Single Photons by Interaction-Free Measurement
| Autor: | Wolfgramm, Florian, Astiz, Yannick A. de Icaza, Beduini, Federica A., Cere, Alessandro, Mitchell, Morgan W. |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 106, 053602 (2011) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.106.053602 |
| Popis: | 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 auto-correlation measurement shows $g_c^{(2)}(0)=0.040 \pm 0.012$, i.e., suppression of multi-photon 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. Comment: 5 pages, 4 figures |
| Databáze: | arXiv |
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