Doppler Spectroscopy of an Ytterbium Bose-Einstein Condensate on the Clock Transition

Abstract

We describe Doppler spectroscopy of Bose-Einstein condensates of ytterbium atoms using a narrow optical transition. We address the optical clock transition around 578 nm between the ${}^1{S}_0$ and ${}^3{P}_0$ states with a laser system locked on a high-finesse cavity. We show how the absolute frequency of the cavity modes can be determined within a few tens of kHz using high-resolution spectroscopy on molecular iodine. We show that optical spectra reflect the velocity distribution of expanding condensates in free fall or after releasing them inside an optical waveguide. We demonstrate sub-kHz spectral linewidths, with long-term drifts of the resonance frequency well below 1 kHz/hour. These results open the way to high-resolution spectroscopy of many-body systems.

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Cited by in corpus (11)

• Clock spectroscopy of interacting bosons in deep optical lattices
• Optical lattice clocks with weakly bound molecules
• Absolute frequency measurements and hyperfine structures of the molecular iodine transitions at 578 nm
• Precise Lifetime Measurement of the Cesium $5^2{D}_{5/2}$ State
• A 3-photon process for producing a degenerate gas of metastable alkaline-earth atoms
• Shelving spectroscopy of the strontium intercombination line
• The frequency of the ultranarrow ${}^1{\text{S}}_0-{}^3{\text{P}}_2$ transition in ${}^{87}\text{Sr}$
• Absolute frequency measurement of molecular iodine hyperfine transitions at 647 nm
• Non-linear Relaxation of Interacting Bosons Coherently Driven on a Narrow Optical Transition
• Dynamics of spatial phase coherence in a dissipative Bose-Hubbard atomic system
• Ab initio studies of the ground and first excited states of the Sr-H${}_2$ and Yb-H${}_2$ complexes