Sideband Rabi spectroscopy of finite-temperature trapped Bose gases
Sideband Rabi spectroscopy of finite-temperature trapped Bose gases
We use Rabi spectroscopy to explore the low-energy excitation spectrum of a finite-temperature Bose gas of rubidium atoms across the phase transition to a Bose-Einstein condensate (BEC). To record this spectrum, we coherently drive the atomic population between two spin states. A small relative displacement of the spin-specific trapping potentials …