Ground-State Cooling of a Trapped Ion Using Long-Wavelength Radiation
Ground-State Cooling of a Trapped Ion Using Long-Wavelength Radiation
We demonstrate ground-state cooling of a trapped ion using radio-frequency (RF) radiation. This is a powerful tool for the implementation of quantum operations, where RF or microwave radiation instead of lasers is used for motional quantum state engineering. We measure a mean phonon number of $\overline{n} = 0.13(4)$ after sideband …