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

Bennett, A. and Gibble, K. and Kokkelmans, S. and Hutson, J. M. (2017) 'Atomic clock measurements of quantum scattering phase shifts spanning Feshbach resonances at ultralow fields.', Physical review letters., 119 (11). p. 113401.

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.

Item Type:Article
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1103/PhysRevLett.119.113401
Publisher statement:Reprinted with permission from the American Physical Society: [Bennett, A., Gibble, K., Kokkelmans, S. & Hutson, J. M. (2017). Atomic clock measurements of quantum scattering phase shifts spanning Feshbach resonances at ultralow fields. Physical Review Letters 119(11): 113401 © 2017 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:22 August 2017
Date deposited:06 October 2017
Date of first online publication:15 September 2017
Date first made open access:06 October 2017

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