Direct observation of resonant scattering phase shifts and their energy dependence

Stephen D. Gensemer, Ross B. Martin-Wells, Aaron W. Bennett, Kurt Gibble

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We scan the collision energy of two clouds of cesium atoms between 12 and 50 μK in an atomic fountain clock. By directly detecting the difference of s-wave scattering phase shifts, we observe a rapid variation of a scattering phase shift through a series of Feshbach resonances. At the energies we use, resonances that overlap at threshold become resolved. Our statistical phase uncertainty of 8 mrad can be improved in future precision measurements of Feshbach resonances to accurately determine the Cs-Cs interactions, which may provide stringent limits on the time variation of fundamental constants.

Original languageEnglish (US)
Article number263201
JournalPhysical Review Letters
Volume109
Issue number26
DOIs
StatePublished - Dec 26 2012

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phase shift
scattering
atomic clocks
wave scattering
cesium
energy
collisions
thresholds
atoms
interactions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Gensemer, Stephen D. ; Martin-Wells, Ross B. ; Bennett, Aaron W. ; Gibble, Kurt. / Direct observation of resonant scattering phase shifts and their energy dependence. In: Physical Review Letters. 2012 ; Vol. 109, No. 26.
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Direct observation of resonant scattering phase shifts and their energy dependence. / Gensemer, Stephen D.; Martin-Wells, Ross B.; Bennett, Aaron W.; Gibble, Kurt.

In: Physical Review Letters, Vol. 109, No. 26, 263201, 26.12.2012.

Research output: Contribution to journalArticle

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