تقرير
Ultracold $^{88}\rm{Sr}_2$ molecules in the absolute ground state
| العنوان: | Ultracold $^{88}\rm{Sr}_2$ molecules in the absolute ground state |
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| المؤلفون: | Leung, K. H., Tiberi, E., Iritani, B., Majewska, I., Moszynski, R., Zelevinsky, T. |
| سنة النشر: | 2021 |
| المجموعة: | Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Physics - Atomic Physics, Physics - Chemical Physics, Quantum Physics |
| الوصف: | We report efficient all-optical creation of an ultracold gas of alkaline-earth-metal dimers, $^{88}\rm{Sr}_2$, in their absolute ground state. Starting with weakly bound singlet molecules formed by narrow-line photoassociation in an optical lattice, followed by stimulated Raman adiabatic passage (STIRAP) via a singlet-dominant channel in the $(1)0_u^+$ excited potential, we prepare pure samples of more than 5500 molecules in $X^1\Sigma_g^+(v=0,J=0)$. We observe two-body collisional loss rates close to the universal limit for both the least bound and most bound vibrational states in $X^1\Sigma_g^+$. We demonstrate the enhancement of STIRAP efficiency in a magic-wavelength optical lattice where thermal decoherence is eliminated. Our results pave the way for the use of alkaline-earth-metal dimers for high-precision spectroscopy, and indicate favorable prospects for robust quantum state preparation of ultracold molecules involving closed-shell atoms, as well as molecule assembly in deep optical traps tuned to a magic wavelength. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/1367-2630/ac2dac |
| URL الوصول: | http://arxiv.org/abs/2108.05996 |
| رقم الأكسشن: | edsarx.2108.05996 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/1367-2630/ac2dac |
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