Author Deiß, Markus dc.contributor.author Author Drews, Björn dc.contributor.author Author Hecker Denschlag, Johannes dc.contributor.author Author Tiemann, Eberhard dc.contributor.author Date of accession 2022-04-06T13:01:22Z dc.date.accessioned Available in OPARU since 2022-04-06T13:01:22Z dc.date.available Date of first publication 2015-08-17 dc.date.issued Abstract We study the combination of the hyperfine and Zeeman structure in the spin–orbit coupled ${A}^{1}{\Sigma }_{u}^{+}-{b}^{3}{\Pi }_{u}$ complex of ${}^{87}{\mathrm{Rb}}_{2}$. For this purpose, absorption spectroscopy at a magnetic field around $B=1000$ G is carried out. We drive optical dipole transitions from the lowest rotational state of an ultracold Feshbach molecule to various vibrational levels with ${0}^{+}$ symmetry of the $A-b$ complex. In contrast to previous measurements with rotationally excited alkali-dimers, we do not observe equal spacings of the hyperfine levels. In addition, the spectra vary substantially for different vibrational quantum numbers, and exhibit large splittings of up to $160$ MHz, unexpected for ${0}^{+}$ states. The level structure is explained to be a result of the repulsion between the states ${0}^{+}$ and ${0}^{-}$ of ${b}^{3}{\Pi }_{u}$, coupled via hyperfine and Zeeman interactions. In general, ${0}^{-}$ and ${0}^{+}$ have a spin–orbit induced energy spacing Δ, that is different for the individual vibrational states. From each measured spectrum we are able to extract Δ, which otherwise is not easily accessible in conventional spectroscopy schemes. We obtain values of Δ in the range of $\pm 100$ GHz which can be described by coupled channel calculations if a spin–orbit coupling is introduced that is different for ${0}^{-}$ and ${0}^{+}$ of ${b}^{3}{\Pi }_{u}$. dc.description.abstract Language en dc.language.iso Publisher Universität Ulm dc.publisher License CC BY 3.0 dc.rights Link to license text https://creativecommons.org/licenses/by/3.0/ dc.rights.uri Keyword ultracold molecules dc.subject Keyword dipole transitions dc.subject Keyword spin–orbit coupling dc.subject Keyword coupled channel calculations dc.subject Dewey Decimal Group DDC 530 / Physics dc.subject.ddc LCSH Spectroscopy dc.subject.lcsh LCSH Hyperfine structure dc.subject.lcsh LCSH Zeeman effect dc.subject.lcsh LCSH Atoms; Effect of low temperatures on dc.subject.lcsh LCSH Molecules; Effect of low temperatures on dc.subject.lcsh LCSH Low temperatures dc.subject.lcsh Title Mixing of 0+ and 0− observed in the hyperfine and Zeeman structure of ultracold Rb2 molecules dc.title Resource type Wissenschaftlicher Artikel dc.type SWORD Date 2022-02-10T22:28:39Z dc.date.updated Version publishedVersion dc.description.version DOI http://dx.doi.org/10.18725/OPARU-42830 dc.identifier.doi URN http://nbn-resolving.de/urn:nbn:de:bsz:289-oparu-42906-0 dc.identifier.urn GND Spektroskopie dc.subject.gnd GND Ultrakaltes Molekül dc.subject.gnd GND Hyperfeinstruktur dc.subject.gnd GND Zeeman-Effekt dc.subject.gnd Faculty Fakultät für Naturwissenschaften uulm.affiliationGeneral Institution Institut für Quantenmaterie uulm.affiliationSpecific Institution Center for Integrated Quantum Science and Technology (IQST) uulm.affiliationSpecific Peer review ja uulm.peerReview DCMI Type Text uulm.typeDCMI Category Publikationen uulm.category DOI of original publication 10.1088/1367-2630/17/8/083032 dc.relation1.doi Source - Title of source New Journal of Physics source.title Source - Place of publication IOP Publishing source.publisher Source - Volume 17 source.volume Source - Issue 8 source.issue Source - Year 2015 source.year Source - eISSN 1367-2630 source.identifier.eissn Bibliography uulm uulm.bibliographie
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