Engineering the sub-Doppler force in magneto-optical traps
Current dual-frequency magneto-optical traps (MOTs) for ultracold molecules are plagued by sub-Doppler heating effects, making them vastly inferior to standard atomic MOTs. Here we demonstrate theoretically that the sub-Doppler effects in such a MOT can be engineered to provide cooling instead of he...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2022-11-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.4.L042036 |
| _version_ | 1797210605838401536 |
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| author | S. Xu P. Kaebert M. Stepanova T. Poll M. Siercke S. Ospelkaus |
| author_facet | S. Xu P. Kaebert M. Stepanova T. Poll M. Siercke S. Ospelkaus |
| author_sort | S. Xu |
| collection | DOAJ |
| description | Current dual-frequency magneto-optical traps (MOTs) for ultracold molecules are plagued by sub-Doppler heating effects, making them vastly inferior to standard atomic MOTs. Here we demonstrate theoretically that the sub-Doppler effects in such a MOT can be engineered to provide cooling instead of heating. We give an intuitive picture how to achieve such cooling and show the cooling and trapping force results of the 16-level optical Bloch equations for the case of CaF molecules. From three-dimensional Monte Carlo simulations we estimate the temperature and density of our MOT to be 40μK and 4×10^{8}cm^{−3}, respectively, for a molecule number of 1×10^{5}. We also extend our idea to the case of atomic MOTs and show that it can be used to produce sub-Doppler forces in these systems that are much more robust against magnetic fields. |
| first_indexed | 2024-04-24T10:13:15Z |
| format | Article |
| id | doaj.art-c3960c012982473caab49bd079092004 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:13:15Z |
| publishDate | 2022-11-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-c3960c012982473caab49bd0790920042024-04-12T17:26:28ZengAmerican Physical SocietyPhysical Review Research2643-15642022-11-0144L04203610.1103/PhysRevResearch.4.L042036Engineering the sub-Doppler force in magneto-optical trapsS. XuP. KaebertM. StepanovaT. PollM. SierckeS. OspelkausCurrent dual-frequency magneto-optical traps (MOTs) for ultracold molecules are plagued by sub-Doppler heating effects, making them vastly inferior to standard atomic MOTs. Here we demonstrate theoretically that the sub-Doppler effects in such a MOT can be engineered to provide cooling instead of heating. We give an intuitive picture how to achieve such cooling and show the cooling and trapping force results of the 16-level optical Bloch equations for the case of CaF molecules. From three-dimensional Monte Carlo simulations we estimate the temperature and density of our MOT to be 40μK and 4×10^{8}cm^{−3}, respectively, for a molecule number of 1×10^{5}. We also extend our idea to the case of atomic MOTs and show that it can be used to produce sub-Doppler forces in these systems that are much more robust against magnetic fields.http://doi.org/10.1103/PhysRevResearch.4.L042036 |
| spellingShingle | S. Xu P. Kaebert M. Stepanova T. Poll M. Siercke S. Ospelkaus Engineering the sub-Doppler force in magneto-optical traps Physical Review Research |
| title | Engineering the sub-Doppler force in magneto-optical traps |
| title_full | Engineering the sub-Doppler force in magneto-optical traps |
| title_fullStr | Engineering the sub-Doppler force in magneto-optical traps |
| title_full_unstemmed | Engineering the sub-Doppler force in magneto-optical traps |
| title_short | Engineering the sub-Doppler force in magneto-optical traps |
| title_sort | engineering the sub doppler force in magneto optical traps |
| url | http://doi.org/10.1103/PhysRevResearch.4.L042036 |
| work_keys_str_mv | AT sxu engineeringthesubdopplerforceinmagnetoopticaltraps AT pkaebert engineeringthesubdopplerforceinmagnetoopticaltraps AT mstepanova engineeringthesubdopplerforceinmagnetoopticaltraps AT tpoll engineeringthesubdopplerforceinmagnetoopticaltraps AT msiercke engineeringthesubdopplerforceinmagnetoopticaltraps AT sospelkaus engineeringthesubdopplerforceinmagnetoopticaltraps |