Observation of Collective-Emission-Induced Cooling inside an Optical Cavity

Details Observation of Collective-Emission-Induced Cooling inside an Optical Cavity Observation of Collective-Emission-Induced Cooling inside an Optical Cavity

2002-08-15

arxiv.org/abs/quant-ph/0208100v1

Physics

Quantum Physics

10 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.90.063003

We report the observation of collective-emission-induced, velocity-dependent light forces. One third of a falling sample containing 3 x 10^6 cesium atoms illuminated by a horizontal standing wave is stopped by cooperatively emitting light into a vertically oriented confocal resonator. We observe decelerations up to 1500 m/s^2 and cooling to temperatures as low as 7 uK, well below the free space Doppler limit. The measured forces substantially exceed those predicted for a single two-level atom.

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