Ultracold mixtures of metastable He and Rb: scattering lengths from ab initio calculations and thermalization measurements
| Autor: | Knoop, S., Żuchowski, P. S., Kȩdziera, D., Mentel, Ł., Puchalski, M., Mishra, H. P., Flores, A. S., Vassen, W. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Phys. Rev. A 90, 022709 (2014) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.90.022709 |
| Popis: | We have investigated the ultracold interspecies scattering properties of metastable triplet He and Rb. We performed state-of-the-art ab initio calculations of the relevant interaction potential, and measured the interspecies elastic cross section for an ultracold mixture of metastable triplet $^4$He and $^{87}$Rb in a quadrupole magnetic trap at a temperature of 0.5 mK. Our combined theoretical and experimental study gives an interspecies scattering length $a_{4+87}=+17^{+1}_{-4}$ $a_0$, which prior to this work was unknown. More general, our work shows the possibility of obtaining accurate scattering lengths using ab initio calculations for a system containing a heavy, many-electron atom, such as Rb. Comment: 11 pages, 11 figures, accepted for publication in Phys. Rev. A |
| Databáze: | arXiv |
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