Spin waves and collisional frequency shifts of a trapped-atom clock

Wilfried Maineult, Christian Deutsch, Kurt Gibble, Jakob Reichel, Peter Rosenbusch

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Abstract

We excite spin waves with spatially inhomogeneous Ramsey pulses and study the resulting frequency shifts of a chip-scale atomic clock of trapped Rb87. The density-dependent frequency shifts of the hyperfine transition simulate the s-wave collisional frequency shifts of fermions, including those of optical lattice clocks. As the spin polarizations oscillate in the trap, the frequency shift reverses and it depends on the area of the second Ramsey pulse, exhibiting a predicted beyond mean-field frequency shift. Numerical and analytic models illustrate these observed behaviors.

Original languageEnglish (US)
Article number020407
JournalPhysical Review Letters
Volume109
Issue number2
DOIs
Publication statusPublished - Jul 12 2012

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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