Measurement of Rb g-series quantum defect using two-photon microwave spectroscopy

Abstract

We utilize two-photon high-precision microwave spectroscopy of $ng\to (n+2)g$ transitions to precisely measure the high-angular-momentum $g$-series quantum defect of ${}^{85}$Rb. Samples of cold Rydberg atoms in the $ng$ state are prepared via a three-photon optical excitation combined with controlled electric-field mixing and probed with 40-$\mu$s-long microwave interaction pulses. The leading systematic uncertainty arises from DC Stark shifts, which is addressed by a cancellation of background electric fields in all three dimensions. From our measurements and an analysis of systematic uncertainties from DC and AC Stark shifts, van der Waals interactions, and microwave frequency calibration, we obtain ${\delta }_0=0.0039990(21)$ and ${\delta }_2=-0.0202(21)$. We discuss our results in context with recent work elsewhere, as well as applications towards precision measurement.

arXiv comment9 pages, 5 figures, 3 tables

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Cited by in corpus (9)

• Very-high- and ultrahigh- frequency electric field detection using high angular momentum Rydberg states
• Simultaneous multi-band radio-frequency detection using high-orbital-angular-momentum states in a Rydberg-atom receiver
• High-angular-momentum Rydberg states in a room-temperature vapor cell for DC electric-field sensing
• Core polarizability of rubidium using spectroscopy of the ng to nh, ni Rydberg transitions
• Quantum defects of $n$F${}_J$ levels of Cs Rydberg atoms
• High angular momentum coupling for enhanced Rydberg-atom sensing in the VHF band
• Microwave spectroscopy and Zeeman effect of cesium $(n+2)D_{5/2}\to n{F}_J$ Rydberg transitions
• Spectroscopy of the ${}^{85}$Rb 4$D_{3/2}$ state for hyperfine-structure determination
• Measurements of the hyperfine structure of $n{P}_J$ Rydberg states by microwave spectroscopy in Cs atoms