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22. May 2025

Laser cooling of fermionic 137BaF molecules for precision measurements of parity violation

Two levels are great for qubits, but molecules can take it to the next level — currently 112 of them, to be exact.

We've controlled this complexity to realize laser cooling of previously intractable fermionic 137BaF molecules, to our knowledge the most complex molecule laser-cooled to date.

This sets the stage for sensitive tests of parity violation and the Standard Model of particle physics using these molecules!

Article (open access): https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.7.L022041, opens an external URL in a new window

Great work by lead author Felix Kogel, who also theoretically proposed the cooling scheme for such molecules four years earlier (https://iopscience.iop.org/article/10.1088/1367-2630/ac1df2, opens an external URL in a new window), as well as by Tatsam Garg and Marian Rockenhäuser

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