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 (BO). As an example for a possible application, we consider the optimization of a calcium fluoride (CaF) MOT for maximum capture velocity. We find that both the $X^2{\Sigma }^{+}$ to $A^2{\Pi }_{1/2}$ and the $X^2{\Sigma }^{+}$ to $B^2{\Sigma }^{+}$ transition to allow for capture velocities larger than $20$ m/s with $24$ m/s and $23$ m/s 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 and BaF with their low capture velocity MOTs it might offer a route to far more robust magneto-optical trapping.

arXiv comment15 pages, 9 figures

References in corpus (36)

• Realizing a lattice spin model with polar molecules
• Laser cooling of a diatomic molecule
• A precision measurement of the electron's electric dipole moment using trapped molecular ions
• Molecules cooled below the Doppler limit
• An Optical Tweezer Array of Ultracold Molecules
• Sisyphus Laser Cooling of a Polyatomic Molecule
• Radio Frequency Magneto-Optical Trapping of CaF with High Density
• 3-D Magneto-Optical Trap of Yttrium Monoxide
• Ultracold molecules for measuring the electron's electric dipole moment
• Direct Laser Cooling of a Symmetric Top Molecule
• Sub-millikelvin dipolar molecules in a radio-frequency magneto-optical trap
• Laser radiation pressure slowing of a molecular beam
• Laser-Cooled Polyatomic Molecules for Improved Electron Electric Dipole Moment Searches
• Magnetically-Trapped Molecules Efficiently Loaded from a Molecular MOT
• Magnetic trapping and coherent control of laser-cooled molecules
• Sub-Doppler Cooling and Compressed Trapping of YO Molecules at $\mu$K Temperatures
• 1D Magneto-Optical Trap of Polyatomic Molecules
• A Bright, Slow Cryogenic Molecular Beam Source for Free Radicals
• Magneto-optical trapping forces for atoms and molecules with complex level structures
• An intense, cold, velocity-controlled molecular beam by frequency-chirped laser slowing
• Characteristics of a magneto-optical trap of molecules
• A cryogenic beam of refractory, chemically reactive molecules with expansion cooling
• Three-dimensional Doppler, polarization-gradient, and magneto-optical forces for atoms and molecules with dark states
• Methods for measuring the electron EDM using ultracold YbF molecules
• Modeling magneto-optical trapping of CaF molecules
• Optical cycling, radiative deflection and laser cooling of barium monohydride (BaH)
• Laser cooling and magneto-optical trapping of molecules analyzed using optical Bloch equations and the Fokker-Planck-Kramers equation
• Enhancing the capture velocity of a Dy magneto-optical trap with two-stage slowing
• Principles and design of a Zeeman-Sisyphus decelerator for molecular beams
• A Zeeman slower for diatomic molecules
• Efficient production of a narrow-line erbium magneto-optical trap with two-stage slowing
• Three-dimensional modeling magneto-optical trapping of MgF molecule with multilevel rate equations
• Crossed-Beam slowing to enhance narrow-line Ytterbium Magneto-Optic Traps
• Large molasses-like cooling forces for molecules using polychromatic optical fields: A theoretical description
• A general Zeeman slower for type-II transitions and polar molecules
• Type-II Zeeman slowing: Characterization and comparison to conventional radiative beam slowing schemes

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