Lattice-depth measurement using multipulse atom diffraction in and beyond the weakly diffracting limit

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

doi:10.1103/physreva.99.013614

Lattice-depth measurement using multipulse atom diffraction in and beyond the weakly diffracting limit

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

Precise knowledge of optical lattice depths is important for a number of areas of atomic physics, most notably in quantum simulation, atom interferometry, and for the accurate determination of transition matrix elements. In such experiments, lattice depths are often measured by exposing an ultracold atomic gas to a series of off-resonant laser-standing-wave pulses, and fitting theoretical predictions for the fraction of atoms found in each of the allowed momentum states by time-of-flight measurement, after some number of pulses. We present a full analytic model for the time evolution of the atomic populations of the lowest momentum states, which is sufficient for a “weak” lattice, as well as numerical simulations incorporating higher momentum states for both relatively strong and weak lattices. Finally, we consider the situation where the initial gas is explicitly assumed to be at a finite temperature.

Citation

Beswick, B. T., Hughes, I. G., & Gardiner, S. A. (2019). Lattice-depth measurement using multipulse atom diffraction in and beyond the weakly diffracting limit. Physical Review A, 99(1), Article 013614. https://doi.org/10.1103/physreva.99.013614

Journal Article Type	Article
Acceptance Date	Dec 7, 2018
Online Publication Date	Jan 16, 2019
Publication Date	Jan 16, 2019
Deposit Date	Jan 16, 2019
Publicly Available Date	Jan 18, 2019
Journal	Physical Review A
Print ISSN	2469-9926
Electronic ISSN	2469-9934
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	99
Issue	1
Article Number	013614
DOI	https://doi.org/10.1103/physreva.99.013614

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