TY - JOUR
KW - atom interferometry
KW - optical lattices
KW - optimization
KW - quantum control
AU - Carrie Weidner
AU - Dana Anderson
AB - 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 ±2ℏkL 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 ±6ℏkL 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 ±4ℏkL and ±6ℏkL 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 4ℏkL splitting is presented.
BT - New Journal of Physics
DA - 2018-07
DO - 10.1088/1367-2630/aad36c
N2 - 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 ±2ℏkL 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 ±6ℏkL 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 ±4ℏkL and ±6ℏkL 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 4ℏkL splitting is presented.
PY - 2018
T2 - New Journal of Physics
TI - Simplified landscapes for optimization of shaken lattice interferometry
UR - http://iopscience.iop.org/article/10.1088/1367-2630/aad36c/meta
VL - 20
ER -