Atomic, Molecular, and Optical Physics Seminar
Many-Atom Single-Photon Source
MIT and MIT-Harvard Center for Ultracold Atoms
We report on an experiment to generate single-photon pulses following the scheme proposed by Duan, Lukin, Cirac, and Zoller (Nature 414, 413 (2001)), but implemented with a sample of laser-cooled atoms inside an optical resonator. The emission of a single photon into the resonator on a Raman transition prepares an entangled Dicke state of the sample, where a single excitation is shared symmetrically between all atoms. Within the coherence time of the Dicke state, the sample can subsequently be made to emit a single photon on demand into a single spatial mode. We report on source efficiency, coherence time, and prospects for the generation of narrowband, single-mode, high-purity single-photon pulses.
Monday, October 18, 2004
Gant Science Complex