|Title||Simplified landscapes for optimization of shaken lattice interferometry|
|Publication Type||Journal Article|
|Year of Publication||2018|
|Authors||Weidner, CA, Anderson, DZ|
|Journal||New Journal of Physics|
|Keywords||atom interferometry, optical lattices, optimization, quantum control|
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 ('shaken') optical lattice. Using a simple analytic model we are able to show that we can obtain the simplest case of ±2 [hbar] kL 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 ±6 [hbar] kL 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 ±4 [hbar] kL and ±6 [hbar] kL 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] kL splitting is presented.
|Short Title||New J. Phys.|