Lattice-depth measurement using continuous grating atom diffraction

Beswick, Benjamin T.; Hughes, Ifan G.; Gardiner, Simon A.

doi:10.1103/physreva.100.063629

Lattice-depth measurement using continuous grating atom diffraction

Beswick, Benjamin T.; Hughes, Ifan G.; Gardiner, Simon A.

Authors

Benjamin T. Beswick

Professor Ifan Hughes i.g.hughes@durham.ac.uk
Professor

Professor Simon Gardiner s.a.gardiner@durham.ac.uk
Professor

Abstract

We propose an approach to characterizing the depths of optical lattices, in which either an atomic gas is given a finite initial momentum or, alternatively, a corresponding “walking” configuration is applied to the optical lattice itself. This leads to high-amplitude oscillations in the zeroth diffraction order which are robust to finite-temperature effects. We present a simplified model yielding an analytic formula describing such oscillations for a gas assumed to be at zero temperature. This model is extended to include atoms with initial momenta detuned from our chosen initial value, before analyzing the full finite-temperature response of the system. Finally, we present a steady-state solution to the finite-temperature system, which in principle makes possible the measurement of both the lattice depth and the initial temperature of the atomic gas from a single common data set.

Citation

Beswick, B. T., Hughes, I. G., & Gardiner, S. A. (2019). Lattice-depth measurement using continuous grating atom diffraction. Physical Review A, 100(6), Article 063629. https://doi.org/10.1103/physreva.100.063629

Journal Article Type	Article
Acceptance Date	Oct 8, 2019
Online Publication Date	Dec 16, 2019
Publication Date	Dec 16, 2019
Deposit Date	Dec 19, 2019
Publicly Available Date	Jan 8, 2020
Journal	Physical Review A
Print ISSN	2469-9926
Electronic ISSN	2469-9934
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	100
Issue	6
Article Number	063629
DOI	https://doi.org/10.1103/physreva.100.063629

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Copyright Statement
Reprinted with permission from the American Physical Society: Beswick, Benjamin T., Hughes, Ifan G. & Gardiner, Simon A. (2019). Lattice-depth measurement using continuous grating atom diffraction. Physical Review A 100(6): 063629 © 2019 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.