Controlled Single-Photon Emission from a Single Trapped Two-Level Atom

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Science  15 Jul 2005:
Vol. 309, Issue 5733, pp. 454-456
DOI: 10.1126/science.1113394

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By illuminating an individual rubidium atom stored in a tight optical tweezer with short resonant light pulses, we created an efficient triggered source of single photons with a well-defined polarization. The measured intensity correlation of the emitted light pulses exhibits almost perfect antibunching. Such a source of high-rate, fully controlled single-photon pulses has many potential applications for quantum information processing.

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