Characterisation of a triple-species ${}^\text{87}$Rb/ ${}^\text{85}$Rb/ ${}^\text{133}$Cs magneto-optical trap
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2026
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| author | Landru, Mal Lauret, Amandine Bidel, Yannick Bresson, Alexandre Schwartz, Sylvain Bonnin, Alexis Godard, Antoine Zahzam, Nassim |
| author_facet | Landru, Mal Lauret, Amandine Bidel, Yannick Bresson, Alexandre Schwartz, Sylvain Bonnin, Alexis Godard, Antoine Zahzam, Nassim |
| contents | We present the simultaneous trapping and cooling of ${}^{85}$Rb, ${}^{87}$Rb and ${}^{133}$Cs in a triple-species magneto-optical trap (MOT). This demonstration is obtained using an all-fibre compact and robust laser system based on telecom 1.5 $μ$m and 2 $μ$m technologies. We characterise the two-body interspecies losses in the double and triple-species MOT. We calculate the two-body interspecies trap-loss coefficient for the ${}^{85}$Rb/${}^{133}$Cs and the ${}^{87}$Rb/${}^{133}$Cs pairs, representing a variation of less than 7% in atom number. No losses are observed between ${}^{85}$Rb and ${}^{87}$Rb in our experimental conditions. We find that interspecies interactions inside the triple-species MOT do not prevent trapping and cooling 10$^{8}$ atoms for each species, making our system suitable for future applications such as multi-species atom interferometry. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2605_04170 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Characterisation of a triple-species ${}^\text{87}$Rb/ ${}^\text{85}$Rb/ ${}^\text{133}$Cs magneto-optical trap Landru, Mal Lauret, Amandine Bidel, Yannick Bresson, Alexandre Schwartz, Sylvain Bonnin, Alexis Godard, Antoine Zahzam, Nassim Atomic Physics We present the simultaneous trapping and cooling of ${}^{85}$Rb, ${}^{87}$Rb and ${}^{133}$Cs in a triple-species magneto-optical trap (MOT). This demonstration is obtained using an all-fibre compact and robust laser system based on telecom 1.5 $μ$m and 2 $μ$m technologies. We characterise the two-body interspecies losses in the double and triple-species MOT. We calculate the two-body interspecies trap-loss coefficient for the ${}^{85}$Rb/${}^{133}$Cs and the ${}^{87}$Rb/${}^{133}$Cs pairs, representing a variation of less than 7% in atom number. No losses are observed between ${}^{85}$Rb and ${}^{87}$Rb in our experimental conditions. We find that interspecies interactions inside the triple-species MOT do not prevent trapping and cooling 10$^{8}$ atoms for each species, making our system suitable for future applications such as multi-species atom interferometry. |
| title | Characterisation of a triple-species ${}^\text{87}$Rb/ ${}^\text{85}$Rb/ ${}^\text{133}$Cs magneto-optical trap |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2605.04170 |