The work has been done in collaboration between theory by Tijs Karman at the IMM and the experimental group of Xinyu Luo and Immanuel Bloch at the Max Planck institute for Quantum optics (MPQ) in Garching, Germany. The research team measured interactions between “shielded” molecules, and how these depend on the microwave frequency and polarization. Using the microwaves, the researchers could independently control both the dipole-dipole interaction and the ‘contact interaction’ at shorter distances. The ‘contact interaction’ is controlled using the “field-linked states”.
This realizes a stable quantum gas of molecules with controllable interactions; an ideal platform to investigate novel quantum many-body physics and to produce ultracold four-atomic molecules. The results have been published in a recent Nature publication entitled ‘Field-linked resonances of polar molecules’.
Tijs Karman is Assistant Professor in the Theoretical and Computational Chemistry department. The group is part of IMM. They aim to explain and predict properties of molecules, clusters, and molecular solids. Part of the research is to study quantum phenomena in molecular collisions. Karman focuses on theoretical research into collisions between ultracold molecules, which are promising for quantum computing and simulation. Ultimately realizing these applications requires understanding and controlling collisions and interactions between molecules.
Field-linked resonances of polar molecules
Xing-Yan Chen, Andreas Schindewolf, Sebastian Eppelt, Roman Bause, Marcel Duda, Shrestha Biswas, Tijs Karman, Timon Hilker, Immanuel Bloch, and Xin-Yu Luo
For more information, please contact
Tijs Karman: t.karman [at] science.ru.nl
IMM Communications: imm-communication [at] ru.nl
Link Nature publication Evaporation of microwave-shielded polar molecules to quantum degeneracy | Nature