Simplified landscapes for optimization of shaken lattice interferometry

Author
Abstract
<p>Motivated by recent results using shaken optical lattices to perform atom interferometry, we explore the splitting of an atom cloud trapped in a phase-modulated (\textquoterightshaken\textquoteright) optical lattice. Using a simple analytic model we are able to show that we can obtain the simplest case of \textpm2 [hbar] k<sub>L</sub> splitting via single-frequency shaking. This is confirmed both via simulation and experiment. Furthermore, we are able to split with a relative phase θ between the two split arms of 0 or π depending on our shaking frequency. Addressing higher-order splitting, we determine that \textpm6 [hbar] k<sub>L</sub> splitting is sufficient to be able to accelerate the atoms in counterpropagating lattices. Finally, we show that we can use a genetic algorithm to optimize \textpm4 [hbar] k<sub>L</sub> and \textpm6 [hbar] k<sub>L</sub> splitting to within ≈0.1\% by restricting our optimization to the resonance frequencies corresponding to single- and two-photon transitions between Bloch bands. As a proof-of-principle, an experimental demonstration of simplified optimization of 4 [hbar] k<sub>L</sub> splitting is presented.</p>
Year of Publication
2018
Journal
New Journal of Physics
Volume
20
Date Published
2018-07
URL
http://iopscience.iop.org/article/10.1088/1367-2630/aad36c/meta
DOI
10.1088/1367-2630/aad36c
JILA PI
Journal Article