Ultracold mixtures of cesium with silver, and potassium with silver

The ability to introduce long-range interactions into studied systems has been a goal of many research groups. One of the promising avenues is to use ultracold heteronuclear ground state molecules formed from pre-cooled atoms. Typical candidates are alkali dimers, with LiCs offering the largest electric dipole moment, 5.6 Debye. No one has yet demonstrated such a molecule in a laboratory. We take a different approach that, we hope, will be a game-changer in the field: we are pursuing ultracold molecules formed by cesium and silver (with the electric dipole moment exceeding 10 Debye), as well as the one containing potassium and silver. We are now constructing the experimental setup which in many aspects will be extremely unique: it will allow us to laser cool potassium, cesium and silver, opening new, exciting avenues for research. At the heart of laser cooling of silver is a UV laser system (328 nm). It is a quite unique device, which we are going to make even more special and powerful by stabilizing its frequency to an optical frequency comb. This will enable laser spectroscopy of silver at an unprecedented level of precision that will not be easily matched by other research groups. The general idea of the laser system and the vacuum setup that we are currently finalizing is below:

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