EIT spectroscopy of high-lying Rydberg states in ${}^{39}K$

Abstract

We present a study of the Rydberg spectrum in ${}^{39}K$ for $nS$ and $n{D}_{3/2}$ series connected to $5^2{P}_{1/2}$ using two-photon spectroscopy based on EIT in a heated vapor cell. We observed some 80 transitions from $5P_{1/2}$ to Rydberg states with principal quantum numbers $n\sim 50-90$, and determined their transition frequencies and state energies with sub-GHz precision. Our spectroscopy results lay the groundwork for using Rydberg atoms as sensitive microwave photon detectors in searches for dark matter axions in the $\sim 40-200$ $\mu$eV mass range, which is a prime range for future axion searches suggested by theory studies.

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Cited by in corpus (2)

• Quantum Science and the Search for Axion Dark Matter
• Rydberg-atom-based single-photon detection for haloscope axion searches