Hannover 2020 – scientific programme
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A: Fachverband Atomphysik
A 22: Poster Session - Atomic Physics III
A 22.16: Poster
Wednesday, March 11, 2020, 16:00–18:00, Empore Lichthof
Characterizing molecular symmetries with quantum gas microscopy — •Simon Hollerith1, Jun Rui1, Antonio Rubio-Abadal1, David Wei1, Kritsana Srakaew1, Simon Evered1, Christian Gross1,2, and Immanuel Bloch1,3 — 1Max-Planck-Institut für Quantenoptik, 85748 Garching — 2Physikalisches Institut, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen — 3Fakultät für Physik, Ludwig-Maximilians-Universität München, 80799 München
Rydberg macrodimers - molecules consisting of two bound highly excited Rydberg atoms - provide enormous bond lengths even resolvable with optical wavelengths. Here we report on a microscopic study of macrodimers with different molecular symmetries in a gas of ultracold atoms in an optical lattice. The bond length of about 0.7 micrometers matches the diagonal distance of two atoms in the lattice. The geometry of the two-dimensional lattice initially unity filled with ground state atoms allows to control the relative orientation of the molecular axis to an ambient magnetic field and the polarization of the photoassociation light. Using our spatially resolved detection, we detect the associated molecules by correlated atom loss and find the excitation rates to be in agreement with theoretical predictions. Furthermore, we present how the molecular excitation rate can be significantly increased by the use of two color photoassociation. Our results highlight the potential of quantum gas microscopy for molecular physics and show how macrodimers might be used to study many body physics.