E. Uruñuela, W. Alt, E. Keiler, D. Meschede, D. Pandey, H. Pfeifer, and T. Macha:
Phys. Rev. A 101, 023415 (2020)
🔓 arXiv:1909.08894 (2019)
We report on vibrational ground-state cooling of a single neutral atom coupled to a high-bandwidth Fabry-PĂ©rot cavity. The cooling process relies on degenerate Raman sideband transitions driven by dipole trap beams, which confine the atoms in three dimensions. We infer a one-dimensional motional ground-state population close to 90% by means of Raman spectroscopy. Moreover, lifetime measurements of a cavity-coupled atom exceeding 40 s imply three-dimensional cooling of the atomic motion, which makes this resource-efficient technique particularly interesting for cavity experiments with limited optical access.