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Radio frequency antennas based on Rydberg atoms can in principle reachsensitivities beyond those of any conventional wire antenna, especially atlower frequencies where very long wires are needed to accommodate the growingwavelength. This paper presents a detailed theoretical investigation of Rydbergantenna sensitivity, elucidating parameter regimes that could cumulatively leadto 2--3 orders of magnitude sensitivity increase. Of special interest arethree-laser setups proposed to compensate for atom motion-induced Dopplerspreading. Such setups are in indeed shown to be advantageous, but only becausethey restore sensitivity to the \emph{expected} Doppler-limited value, removingsignificant additional off-resonance reductions.

Doppler sensitivity and optimization of Rydberg atom-based antennas