Maximizing the capture velocity of molecular magneto-optical traps with Bayesian optimization

authored by: S. Xu, P. Kaebert, M. Stepanova, T. Poll, M. Siercke, S. Ospelkaus
Abstract: Magneto-optical trapping (MOT) is a key technique on the route towards ultracold molecular ensembles. However, the realization and optimization of magneto-optical traps with their wide parameter space is particularly difficult. Here, we present a very general method for the optimization of molecular magneto-optical trap operation by means of Bayesian optimization. As an example for a possible application, we consider the optimization of a calcium fluoride MOT for maximum capture velocity. We find that both the X 2Σ+ to A 2Π1/2 and the X 2Σ+ to B 2Σ+ transition to allow for capture velocities with 24 m s-1 and 23 m s-1 respectively at a total laser power of 200 mW. In our simulation, the optimized capture velocity depends logarithmically on the beam power within the simulated power range of 25 to 400 mW. Applied to heavy molecules such as BaH, BaF, YbF and YbOH with their low capture velocity MOTs it might offer a route to far more robust MOT.
Organisation(s): QuantumFrontiers
Institute of Quantum Optics
Type: Article
Journal: New journal of physics
Volume: 23
ISSN: 1367-2630
Publication date: 21.06.2021
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Physics and Astronomy(all)
Electronic version(s): https://doi.org/10.1088/1367-2630/ac06e6 (Access: Open)

BibTeX

@article{121cfe0c7a3d49cea2f63fbd728d7925,
title = "Maximizing the capture velocity of molecular magneto-optical traps with Bayesian optimization",
abstract = "Magneto-optical trapping (MOT) is a key technique on the route towards ultracold molecular ensembles. However, the realization and optimization of magneto-optical traps with their wide parameter space is particularly difficult. Here, we present a very general method for the optimization of molecular magneto-optical trap operation by means of Bayesian optimization. As an example for a possible application, we consider the optimization of a calcium fluoride MOT for maximum capture velocity. We find that both the X 2Σ+ to A 2Π1/2 and the X 2Σ+ to B 2Σ+ transition to allow for capture velocities with 24 m s-1 and 23 m s-1 respectively at a total laser power of 200 mW. In our simulation, the optimized capture velocity depends logarithmically on the beam power within the simulated power range of 25 to 400 mW. Applied to heavy molecules such as BaH, BaF, YbF and YbOH with their low capture velocity MOTs it might offer a route to far more robust MOT. ",
keywords = "Bayesian optimization, cold molecules, laser cooling, magneto-optical trap",
author = "S. Xu and P. Kaebert and M. Stepanova and T. Poll and M. Siercke and S. Ospelkaus",
year = "2021",
month = jun,
day = "21",
doi = "10.1088/1367-2630/ac06e6",
language = "English",
volume = "23",
journal = "New journal of physics",
issn = "1367-2630",
publisher = "IOP Publishing Ltd.",
number = "6",
}