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Radiative lifetime of high Rydberg states perturbed by a neutral atom

M. I. Chibisov, R.K. Janev, I. I. Fabrikant, Xavier Urbain, Freddy Brouillard

Published Jan 1, 2007• 0 citations
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Barium-based Rydberg atom quantum technologies with long Rydberg coherence

Xiao-Feng Shi

The short Doppler-limited coherence time of the laser-excited Rydberg state, usually orders of magnitude shorter than the lifetime of the Rydberg state, hinders the Rydberg-mediated quantum technologies. Here, we show that a 649~nm~$-$~658~nm two-photon excitation of the $6sng~^1G_4$ Rydberg state from a long-lived d-orbital clock state of barium can be achieved with a two-photon wavevector that is tiny, which effectively removes the Doppler-limited decoherence. Moreover, the $6sng~^1G_4$ Rydberg state has strong dipole-dipole interaction due to small Förster defect with nearby Rydberg states and possesses long radiative lifetime. These can benefit quantum computing based on individually trapped neutral atoms, and can enable long-lived Rydberg polaritons in atomic media, which brings fresh opportunities in all-optical quantum information.

quant-pharXiv:2607.11282•Physical Review A•Jul 14, 2026•2 citations

Multichannel quantum-defect theory of lifetimes for highly excited states of atoms: Calculation of Yb lifetimes in the perturbed 6snd 1 ,3 D2 sequences

X. W. Liu, Z -W Wang

By combining the quantum theory of radiative transition with multichannel quantum-defect theory, we have derived a general formula to calculate the lifetimes of highly excited states for atoms. As an example, we have evaluated the lifetimes for the perturbed 6snd $^{1}D_{2}$ (n=8--40) and 6snd $^{3}D_{2}$ (n=10--26) Rydberg levels, and the perturbers of the ytterbium atom. We have not only obtained results that are in perfect agreement with the recent measurements, but also predicted the lifetimes of 18 other highly excited states. The results indicate that the dramatic variation for lifetimes of Rydberg states in the vicinity of perturbing states is due to the strong channel interaction.

Physical Review A•Aug 1, 1989•15 citations

Highly excited even Rydberg series of Lu I studied by two-step laser photoionisation spectroscopy

H. Maeda, Yoshihiro MIZUGAI, Yoshiteru Matsumoto +2 more

The highly excited even levels of the lutetium atom are studied by two-step resonance ionisation spectroscopy. Four Rydberg series, 6s 2 ns 2 S 1/2 (n=17-76), 6s 2 nd 2 D 3/2 (n=14-105), 6s 2 nd 2 D 5/2 (n=19-87) and 6s 2 ng 2 G 9/2 (n=21-61), are measured and analysed. A very weak perturbation from an unassigned J= 3 / 2 even valence level is observed around 6s 2 52d 2 D 3/2 as a dip of ion signals induced by a decrease of radiative lifetimes in the perturbed Rydberg states. Small dips observed in nearby 6s 2 ns 2 S 1/2 and 6s 2 nd 2 D 5/2 Rydberg states are interpreted as the influence of the quadrupole hyperfine interaction of 175 Lu (I= 7 / 2 ).

Journal of Physics B Atomic Molecular and Optical Physics•Sep 28, 1989•16 citations

Radiative cascade between Rydberg atomic states

A. B. Kukushkin, Valerii S. Lisitsa

Zhurnal Eksperimentalnoi i Teoreticheskoi Fiziki•May 1, 1985•2 citations
The short Doppler-limited coherence time of the laser-excited Rydberg state, usually orders of magnitude shorter than the lifetime of the Rydberg state, hinders the Rydberg-mediated quantum technologies. Here, we show that a 649~nm~−-−~658~nm two-photon excitation of the 6sng 1G46sng~^1G_46sng 1G4​ Rydberg state from a long-lived d-orbital clock state of barium can be achieved with a two-photon wavevector that is tiny, which effectively removes the Doppler-limited decoherence. Moreover, the 6sng 1G46sng~^1G_46sng 1G4​ Rydberg state has strong dipole-dipole interaction due to small Förster defect with nearby Rydberg states and possesses long radiative lifetime. These can benefit quantum computing based on individually trapped neutral atoms, and can enable long-lived Rydberg polaritons in atomic media, which brings fresh opportunities in all-optical quantum information.
By combining the quantum theory of radiative transition with multichannel quantum-defect theory, we have derived a general formula to calculate the lifetimes of highly excited states for atoms. As an example, we have evaluated the lifetimes for the perturbed 6snd 1D2^{1}D_{2}1D2​ (n=8--40) and 6snd 3D2^{3}D_{2}3D2​ (n=10--26) Rydberg levels, and the perturbers of the ytterbium atom. We have not only obtained results that are in perfect agreement with the recent measurements, but also predicted the lifetimes of 18 other highly excited states. The results indicate that the dramatic variation for lifetimes of Rydberg states in the vicinity of perturbing states is due to the strong channel interaction.
The highly excited even levels of the lutetium atom are studied by two-step resonance ionisation spectroscopy. Four Rydberg series, 6s 2 ns 2 S 1/2 (n=17-76), 6s 2 nd 2 D 3/2 (n=14-105), 6s 2 nd 2 D 5/2 (n=19-87) and 6s 2 ng 2 G 9/2 (n=21-61), are measured and analysed. A very weak perturbation from an unassigned J= 3 / 2 even valence level is observed around 6s 2 52d 2 D 3/2 as a dip of ion signals induced by a decrease of radiative lifetimes in the perturbed Rydberg states. Small dips observed in nearby 6s 2 ns 2 S 1/2 and 6s 2 nd 2 D 5/2 Rydberg states are interpreted as the influence of the quadrupole hyperfine interaction of 175 Lu (I= 7 / 2 ).