Sympathetic cooling of molecular ion motion to the ground state

2014/12/02 by Rene Rugango, James E. Goeders, Thomas H. Dixon +5 · 1 citation
Physics and Astronomy · #physics.atom-ph

paper · pdf · doi:10.1088/1367-2630/17/3/035009

8 pages, 3 figures

arxiv created 2014/12/02 · arxiv updated 2015/06/23

Abstract

We demonstrate sympathetic sideband cooling of a ⁴⁰CaH⁺ molecular ion co-trapped with a ⁴⁰Ca⁺ atomic ion in a linear Paul trap. Both axial modes of the two-ion chain are simultaneously cooled to near the ground state of motion. The center of mass mode is cooled to an average quanta of harmonic motion n_COM = 0.13 ± 0.03, corresponding to a temperature of 12.47 ± 0.03 ~μK. The breathing mode is cooled to n_BM = 0.05 ± 0.02, corresponding to a temperature of 15.36 ± 0.01~μK.

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