An Optical Clock with Ultracold Neutral Atoms

Details An Optical Clock with Ultracold Neutral Atoms An Optical Clock with Ultracold Neutral Atoms

2002-05-16

arxiv.org/abs/physics/0205049v2

Physics

Atomic Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.89.230801

We demonstrate how to realize an optical clock with neutral atoms that is competitive to the currently best single ion optical clocks in accuracy and superior in stability. Using ultracold atoms in a Ca optical frequency standard we show how to reduce the relative uncertainty to below 1E-15. We observed atom interferences for stabilization of the laser to the clock transition with a visibility of 0.36, which is 70 % of the ultimate limit achievable with atoms at rest. A novel scheme was applied to detect these atom interferences with the prospect to reach the quantum projection noise limit at an exceptional low instability of 4E-17 in 1 s.

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