Formation of ultracold weakly bound dimers of bosonic 23Na39K

authored by: Kai Konrad Voges, Philipp Gersema, Torsten Hartmann, Torben Alexander Schulze, Alessandro Zenesini, Silke Ospelkaus-Schwarzer
Abstract: We create weakly bound bosonic 23Na39K molecules in a mixture of ultracold Na23 and K39. The creation is done in the vicinity of a so far undetected Feshbach resonance at about 196 G which we identify in this work by atom-loss spectroscopy. We investigate the involved molecular state by performing destructive radio-frequency binding-energy measurements. For the constructive molecule creation we use radio-frequency pulses with which we assemble up to 6000 molecules. We analyze the molecule creation efficiency as a function of the radio-frequency pulse duration and the atom number ratio between Na23 and K39. We find an overall optimal efficiency of 6% referring to the K39 atom number. The measured lifetime of the molecules in the bath of trapped atoms is about 0.3 ms.
Organisation(s): Institute of Quantum Optics
CRC 1227 Designed Quantum States of Matter (DQ-mat)
Type: Article
Journal: Physical Review A
Volume: 101
ISSN: 2469-9926
Publication date: 20.04.2020
Publication status: Published
ASJC Scopus subject areas: Atomic and Molecular Physics, and Optics
Electronic version(s): http://arxiv.org/pdf/1912.04395 (Access: Open)
https://doi.org/10.1103/PhysRevA.101.042704 (Access: Closed)

BibTeX

@article{bce505c0869441cfbf41487e41215fc2,
title = "Formation of ultracold weakly bound dimers of bosonic 23Na39K",
abstract = "We create weakly bound bosonic 23Na39K molecules in a mixture of ultracold Na23 and K39. The creation is done in the vicinity of a so far undetected Feshbach resonance at about 196 G which we identify in this work by atom-loss spectroscopy. We investigate the involved molecular state by performing destructive radio-frequency binding-energy measurements. For the constructive molecule creation we use radio-frequency pulses with which we assemble up to 6000 molecules. We analyze the molecule creation efficiency as a function of the radio-frequency pulse duration and the atom number ratio between Na23 and K39. We find an overall optimal efficiency of 6% referring to the K39 atom number. The measured lifetime of the molecules in the bath of trapped atoms is about 0.3 ms.",
author = "Voges, {Kai Konrad} and Philipp Gersema and Torsten Hartmann and Schulze, {Torben Alexander} and Alessandro Zenesini and Silke Ospelkaus-Schwarzer",
note = "Funding information: We thank E. Tiemann for enlightening discussions and theory support. 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. K.K.V. and P.G. thank the DFG for financial support through Research Training Group 1991.",
year = "2020",
month = apr,
day = "20",
doi = "10.1103/PhysRevA.101.042704",
language = "English",
volume = "101",
journal = "Physical Review A",
issn = "2469-9926",
publisher = "American Physical Society",
number = "4",
}