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Lattice-depth measurement using continuous grating atom diffraction.

Beswick, Benjamin T. and Hughes, Ifan G. and Gardiner, Simon A. (2019) 'Lattice-depth measurement using continuous grating atom diffraction.', Physical review A., 100 (6). 063629.


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.

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Publisher 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.
Date accepted:08 October 2019
Date deposited:08 January 2020
Date of first online publication:16 December 2019
Date first made open access:08 January 2020

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