High Density Loading and Collisional Loss of Laser-Cooled Molecules in an Optical Trap.
| Autor: | Jorapur V; Department of Physics, Yale University, New Haven, Connecticut 06511, USA.; Department of Physics, University of Chicago, Chicago, Illinois 60637, USA., Langin TK; Department of Physics, University of Chicago, Chicago, Illinois 60637, USA., Wang Q; Department of Physics, University of Chicago, Chicago, Illinois 60637, USA., Zheng G; Department of Physics, University of Chicago, Chicago, Illinois 60637, USA., DeMille D; Department of Physics, University of Chicago, Chicago, Illinois 60637, USA. |
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| Jazyk: | angličtina |
| Zdroj: | Physical review letters [Phys Rev Lett] 2024 Apr 19; Vol. 132 (16), pp. 163403. |
| DOI: | 10.1103/PhysRevLett.132.163403 |
| Abstrakt: | We report optical trapping of laser-cooled molecules at sufficient density to observe molecule-molecule collisions for the first time in a bulk gas. SrF molecules from a red-detuned magneto-optical trap (MOT) are compressed and cooled in a blue-detuned MOT. Roughly 30% of these molecules are loaded into an optical dipole trap with peak number density n_{0}≈3×10^{10} cm^{-3} and temperature T≈40 μK. We observe two-body loss with rate coefficient β=2.7_{-0.8}^{+1.2}×10^{-10} cm^{3} s^{-1}. Achieving this density and temperature opens a path to evaporative cooling towards quantum degeneracy of laser-cooled molecules. |
| Databáze: | MEDLINE |
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