A mode-selective Raman quantum memory in warm cesium vapor estimates the separation between two spectral lines with up to a 34-fold precision enhancement over direct intensity detection, resolving separations down to 1/20 of the linewidth.
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Super-resolving frequency measurement with mode-selective quantum memory
A mode-selective Raman quantum memory in warm cesium vapor estimates the separation between two spectral lines with up to a 34-fold precision enhancement over direct intensity detection, resolving separations down to 1/20 of the linewidth.