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

verfasst von: S. Xu, R. Li, Y. Xia, M. Siercke, S. Ospelkaus
Abstract: Direct laser cooling and trapping of molecules to temperature below the Doppler limit and density exceeding 108 are challenging due to the sub-Doppler heating effects of a molecular magneto-optical trap (MOT). In our previous paper [S. Xu, Phys. Rev. Res. 4, L042036 (2022)2643-156410.1103/PhysRevResearch.4.L042036], 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 μK and 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 MOTs.
Organisationseinheit(en): Institut für Quantenoptik
QuantumFrontiers
Externe Organisation(en): National Institute of Extremely-Weak Magnetic Field Infrastructure
East China Normal University
Typ: Artikel
Journal: Physical Review A
Band: 108
ISSN: 2469-9926
Publikationsdatum: 05.09.2023
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Atom- und Molekularphysik sowie Optik
Elektronische Version(en): https://doi.org/10.48550/arXiv.2305.16576 (Zugang: Offen)
https://doi.org/10.1103/PhysRevA.108.033102 (Zugang: Geschlossen)

BibTeX

@article{65eb1dc7b5154d1b995c5cedec7a7de7,
title = "Blue-detuned molecular magneto-optical trap schemes based on Bayesian optimization",
abstract = "Direct laser cooling and trapping of molecules to temperature below the Doppler limit and density exceeding 108 are challenging due to the sub-Doppler heating effects of a molecular magneto-optical trap (MOT). In our previous paper [S. Xu, Phys. Rev. Res. 4, L042036 (2022)2643-156410.1103/PhysRevResearch.4.L042036], 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 μK and 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 MOTs.",
author = "S. Xu and R. Li and Y. Xia and M. Siercke and S. Ospelkaus",
note = "Funding Information: This work was supported by the National Natural Science Foundation of China under Grants No. 11834003 and No. 91836103. M. Siercke and S. Ospelkaus gratefully acknowledge financial support through Germany's Excellence Strategy—EXC-2123/1 QuantumFrontiers. ",
year = "2023",
month = sep,
day = "5",
doi = "10.48550/arXiv.2305.16576",
language = "English",
volume = "108",
journal = "Physical Review A",
issn = "2469-9926",
publisher = "American Physical Society",
number = "3",
}