QUANTUM OPTICS

Two are better than one

Two-level quantum systems are routinely excited by resonant pump beams. Experiments now show resonant excitation through dichromatic, detuned pumps — providing a coherent control technique that will also aid single-photon emission from solid-state devices.

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Fig. 1: Resonance fluorescence in a quantum dot microcavity.

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Correspondence to Glenn S. Solomon.

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