Ultracold Gas of Bosonic Na 23 K 39 Ground-State Molecules

authored by: Kai K. Voges, Philipp Gersema, Mara Meyer Zum Alten Borgloh, Torben A. Schulze, Torsten Hartmann, Alessandro Zenesini, Silke Ospelkaus
Abstract: We report the creation of ultracold bosonic dipolar Na23K39 molecules in their absolute rovibrational ground state. Starting from weakly bound molecules immersed in an ultracold atomic mixture, we coherently transfer the dimers to the rovibrational ground state using an adiabatic Raman passage. We analyze the two-body decay in a pure molecular sample and in molecule-atom mixtures and find an unexpectedly low two-body decay coefficient for collisions between molecules and K39 atoms in a selected hyperfine state. The preparation of bosonic Na23K39 molecules opens the way for future comparisons between fermionic and bosonic ultracold ground-state molecules of the same chemical species.
Organisation(s): Institute of Quantum Optics
QuantumFrontiers
CRC 1227 Designed Quantum States of Matter (DQ-mat)
External Organisation(s): University of Trento
Type: Article
Journal: Physical review letters
Volume: 125
ISSN: 0031-9007
Publication date: 21.08.2020
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Physics and Astronomy(all)
Electronic version(s): https://doi.org/10.1103/physrevlett.125.083401 (Access: Closed)

BibTeX

@article{9bfb36e250df487da8e0eb64ca5e09a0,
title = "Ultracold Gas of Bosonic Na 23 K 39 Ground-State Molecules",
abstract = "We report the creation of ultracold bosonic dipolar Na23K39 molecules in their absolute rovibrational ground state. Starting from weakly bound molecules immersed in an ultracold atomic mixture, we coherently transfer the dimers to the rovibrational ground state using an adiabatic Raman passage. We analyze the two-body decay in a pure molecular sample and in molecule-atom mixtures and find an unexpectedly low two-body decay coefficient for collisions between molecules and K39 atoms in a selected hyperfine state. The preparation of bosonic Na23K39 molecules opens the way for future comparisons between fermionic and bosonic ultracold ground-state molecules of the same chemical species.",
author = "Voges, {Kai K.} and Philipp Gersema and {Meyer Zum Alten Borgloh}, Mara and Schulze, {Torben A.} and Torsten Hartmann and Alessandro Zenesini and Silke Ospelkaus",
note = "Funding Information: We thank M. Siercke for enlightening comments and discussions and the group of P. O. Schmidt, PTB Brunswick, for providing scientific material for the Raman laser system. We gratefully acknowledge financial support from the European Research Council through ERC Starting Grant POLAR and from the Deutsche Forschungsgemeinschaft (DFG) through CRC 1227 (DQ-mat), project A03, and FOR 2247, project E5. P. G. thanks the DFG for financial support through RTG 1991. ",
year = "2020",
month = aug,
day = "21",
doi = "10.1103/physrevlett.125.083401",
language = "English",
volume = "125",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "8",
}