Sympathetic cooling of polyatomic molecules with S-state atoms in a magnetic trap

Details Sympathetic cooling of polyatomic molecules with S-state atoms in a magnetic trap Sympathetic cooling of polyatomic molecules with S-state atoms in a magnetic trap

2010-10-13

arxiv.org/abs/1010.2567v2

Phys. Rev. Lett. 106, 073201 (2011)

Physics

Atomic Physics

5 pages, 3 figures, 1 table

Scientific paper

10.1103/PhysRevLett.106.073201

We present a rigorous theoretical study of low-temperature collisions of polyatomic molecular radicals with ^1S_0 atoms in the presence of an external magnetic field. Accurate quantum scattering calculations based on ab initio and scaled interaction potentials show that collision-induced spin relaxation of the prototypical organic molecule CH_2(X^3B_1) (methylene) and nine other triatomic radicals in cold 3He gas occurs at a slow rate, demonstrating that cryogenic buffer-gas cooling and magnetic trapping of these molecules is feasible with current technology. Our calculations further suggest that it may be possible to create ultracold gases of polyatomic molecules by sympathetic cooling with alkaline-earth atoms in a magnetic trap.

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