Thermal axial motion of a trapped ion couples to the curvature of the Raman beam profile and appears as low-frequency amplitude control noise, which dephasing-robust quantum noise spectroscopy can separate from native control noise and use to extract motional mode occupation and linewidth.
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Revealing Noise in Axial Motion Through Quantum Noise Spectroscopy on a Trapped Ion Processor
Thermal axial motion of a trapped ion couples to the curvature of the Raman beam profile and appears as low-frequency amplitude control noise, which dephasing-robust quantum noise spectroscopy can separate from native control noise and use to extract motional mode occupation and linewidth.