Speaker
Oliver Corfield
(Imperial College London)
Description
Following results of laser cooling a single ion of $^{40}$Ca$^+$ to its motional ground state ($\bar{n}_z=0.02(1)$) in the axial domain of a Penning trap [1], we report simultaneous sideband cooling of both radial modes to near their ground state in the same apparatus. Sideband cooling is performed on the $S_{1/2} \leftrightarrow D_{5/2}$ electric quadrupole transition at 729 nm, and average phonon numbers for the magnetron and modified cyclotron modes are found to be $\bar{n}_-=0.7(2)$ and $\bar{n}_+=0.3(1)$ respectively. The observation of Rabi oscillations in both the axial and radial domains shows that the electronic state of the ion can be coherently manipulated.
Primary author
Oliver Corfield
(Imperial College London)
