2000 character limit reached
Sympathetic cooling of molecular ion motion to the ground state (1412.0782v1)
Published 2 Dec 2014 in physics.atom-ph
Abstract: We demonstrate sympathetic sideband cooling of a ${40}$CaH${+}$ molecular ion co-trapped with a ${40}$Ca${+}$ 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 $\overline{n}{\mathrm{COM}} = 0.13 \pm 0.03$, corresponding to a temperature of $12.47 \pm 0.03 ~\mu$K. The breathing mode is cooled to $\overline{n}{\mathrm{BM}} = 0.05 \pm 0.02$, corresponding to a temperature of $15.36 \pm 0.01~\mu$K.