Atomic clock measurements of quantum scattering phase shifts spanning Feshbach resonances at ultralow fields

Bennett, A.; Gibble, K.; Kokkelmans, S.; Hutson, J.M.

Abstract

We use an atomic fountain clock to measure quantum scattering phase shifts precisely through a series of narrow, low-field Feshbach resonances at average collision energies below 1 μK. Our low spread in collision energy yields phase variations of order π=2 for target atoms in several F, mF states.We compare them to a theoretical model and establish the accuracy of the measurements and the theoretical uncertainties from the fitted potential.We find overall excellent agreement, with small statistically significant differences that remain unexplained.

Citation

Bennett, A., Gibble, K., Kokkelmans, S., & Hutson, J. (2017). Atomic clock measurements of quantum scattering phase shifts spanning Feshbach resonances at ultralow fields. Physical Review Letters, 119(11), Article 113401. https://doi.org/10.1103/physrevlett.119.113401

• Journal Article Type: Article
• Acceptance Date: Aug 22, 2017
• Online Publication Date: Sep 15, 2017
• Publication Date: Sep 15, 2017
• Deposit Date: Sep 22, 2017
• Publicly Available Date: Oct 6, 2017
• Journal: Physical Review Letters
• Print ISSN: 0031-9007
• Electronic ISSN: 1079-7114
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 119
• Issue: 11
• Article Number: 113401
• DOI: https://doi.org/10.1103/physrevlett.119.113401
• Related Public URLs: https://arxiv.org/abs/1708.03715