Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | L022019 |
| Seitenumfang | 7 |
| Fachzeitschrift | Physical Review Research |
| Jahrgang | 4 |
| Ausgabenummer | 2 |
| Frühes Online-Datum | 25 Apr. 2022 |
| Publikationsstatus | Veröffentlicht - Juni 2022 |
Abstract
We report on the creation of ultracold gases of bosonic Feshbach molecules of NaCs. The molecules are associated from overlapping gases of Na and Cs using a Feshbach resonance at 864.12(5)G. We characterize the Feshbach resonance using bound-state spectroscopy, in conjunction with a coupled-channel calculation. By varying the temperature and atom numbers of the initial atomic mixtures, we demonstrate the association of NaCs gases over a wide dynamic range of molecule numbers and temperatures, reaching 70 nK for our coldest systems and a phase-space density near 0.1. This is an important stepping stone for the creation of degenerate gases of strongly dipolar NaCs molecules in their absolute ground state.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Allgemeine Physik und Astronomie
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in: Physical Review Research, Jahrgang 4, Nr. 2, L022019, 06.2022.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - High phase-space density gas of NaCs Feshbach molecules
AU - Lam, Aden Z.
AU - Bigagli, Niccolò
AU - Warner, Claire
AU - Yuan, Weijun
AU - Zhang, Siwei
AU - Tiemann, Eberhard
AU - Stevenson, Ian
AU - Will, Sebastian
N1 - Funding Information: We thank Tarik Yefsah for fruitful discussions and for helpful comments on the manuscript. We also thank Joseph Lee and Edita Bytyqi for experimental assistance. This work was supported by an NSF CAREER Award (Award No. 1848466), an ONR DURIP Award (Award No. N00014-21-1-2721), and a Lenfest Junior Faculty Development Grant from Columbia University. S.W. acknowledges additional support from the Alfred P. Sloan Foundation. I.S. was supported by the Ernest Kempton Adams Fund. C.W. acknowledges support from the Natural Sciences and Engineering Research Council of Canada (NSERC) and the Chien-Shiung Wu Family Foundation. W. Y. acknowledges support from the Croucher Foundation.
PY - 2022/6
Y1 - 2022/6
N2 - We report on the creation of ultracold gases of bosonic Feshbach molecules of NaCs. The molecules are associated from overlapping gases of Na and Cs using a Feshbach resonance at 864.12(5)G. We characterize the Feshbach resonance using bound-state spectroscopy, in conjunction with a coupled-channel calculation. By varying the temperature and atom numbers of the initial atomic mixtures, we demonstrate the association of NaCs gases over a wide dynamic range of molecule numbers and temperatures, reaching 70 nK for our coldest systems and a phase-space density near 0.1. This is an important stepping stone for the creation of degenerate gases of strongly dipolar NaCs molecules in their absolute ground state.
AB - We report on the creation of ultracold gases of bosonic Feshbach molecules of NaCs. The molecules are associated from overlapping gases of Na and Cs using a Feshbach resonance at 864.12(5)G. We characterize the Feshbach resonance using bound-state spectroscopy, in conjunction with a coupled-channel calculation. By varying the temperature and atom numbers of the initial atomic mixtures, we demonstrate the association of NaCs gases over a wide dynamic range of molecule numbers and temperatures, reaching 70 nK for our coldest systems and a phase-space density near 0.1. This is an important stepping stone for the creation of degenerate gases of strongly dipolar NaCs molecules in their absolute ground state.
UR - http://www.scopus.com/inward/record.url?scp=85130079178&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2202.03355
DO - 10.48550/arXiv.2202.03355
M3 - Article
AN - SCOPUS:85130079178
VL - 4
JO - Physical Review Research
JF - Physical Review Research
SN - 2643-1564
IS - 2
M1 - L022019
ER -