Blue-detuned molecular magneto-optical trap schemes based on bayesian optimization

2023/05/26 by Xu, S., Li, R., Zhai, Y. +3
#Atomic Physics (physics.atom-ph) #FOS: Physical sciences

paper · doi:10.48550/arxiv.2305.16576

Abstract

Direct laser cooling and trapping of molecules to temperature below Doppler limit and density exceeding 10⁸ are challenging due to the sub-Doppler heating effects of molecular magneto-optical trap (MOT). In our previous paper [1], we presented a general approach to engineering the sub- Doppler force by tuning the AC stark shift with the addition of a blue detuned laser. Here, by employing the Bayesian optimization method to optical Bloch equations, we have identified multiple blue-detuned MOT schemes for the CaF molecule. From the three-dimensional Monte-Carlo simulation, we obtained a MOT temperature and density of 14 \rm μK and \rm 4.5 × 10⁸ cm^-3, respectively. Our findings present a potential avenue for directly loading molecular MOTs into conservative traps, which can capitalize on the high density and low temperature of the MOT

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