Lifetime measurements of highly excited Rydberg states of strontium I

Kunze, S.; Hohmann, R.; Kluge, H.-J.; Lantzsch, J.; Monz, L.; Stenner, J.; Stratmann, K.; Wendt, Κ.; Zimmer, K.

doi:10.1007/bf01426757

Cited by 17 publications

(16 citation statements)

References 4 publications

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“…5 again revealed near exponential decay. For the 38 3 S 1 atoms γ ′ TOT = 3.1×10 4 s −1 yielding the BBR-induced decay rate, γ BBR ≈ γ TOT − γ ′ TOT , ∼1.7×10 4 s −1 , a value in good agreement with that calculated using the TAE model, γ BBR = 1.4×10 4 s −1 , and one that is consistent with those reported previously in earlier studies of interactions between BBR and Rydberg atoms [17][18][19]. The effective lifetime of 20 µs calculated using the TAE model is also in good agreement with the measured value of 21(1) µs, although both values are substantially larger than the value reported previously for the 35 3 S 1 state of 7.5(44) µs [20].…”

Section: Resultssupporting

confidence: 90%

Lifetimes of ultra-long-range strontium Rydberg molecules

et al. 2016

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The lifetimes of the lower-lying vibrational states of ultralong-range strontium Rydberg molecules comprising one ground-state 5s2 1S0 atom and one Rydberg atom in the 5s38s 3S1 state are reported. The molecules are created in an ultracold gas held in an optical dipole trap and their numbers determined using field ionization, the product electrons being detected by a microchannel plate. The measurements show that, in marked contrast to earlier measurements involving rubidium Rydberg molecules, the lifetimes of the low-lying molecular vibrational states are very similar to those of the parent Rydberg atoms. This results because the strong p-wave resonance in low-energy electronrubidium scattering, which plays an important role in determining the molecular lifetimes, is not present for strontium. The absence of this resonance offers advantages for experiments involving strontium Rydberg atoms as impurities in quantum gases and for testing theories of molecular formation and decay

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Section: Resultssupporting

confidence: 90%

Lifetimes of ultra-long-range strontium Rydberg molecules

et al. 2016

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“…However, the decay rate of the excited state is less well known. We obtain the best agreement with our data using a decay rate of (Γ 21 + Γ 2Loss ) = 310 × 10 3 s −1 , which is slightly higher than the natural decay rate expected from scaling the results of [59]. The branching ratio calculated from the Wigner-Eckart theorem would imply that 1/3 of the decays from the Rydberg state result in 3 P 1 atoms, but the recoil energy for a single 320 nm photon exceeds the trap depth, so we assume all radiative decay leads to atom loss and set Γ 21 = 0.…”

Section: Experimental Methodssupporting

confidence: 79%

“…We excite atoms exclusively to the 5s24s 3 S 1 Rydberg state (lifetime τ3 S1 ≈ 4µs [59]) with two-photon excitation using the narrow 1 S 0 → 3 P 1 transition (τ3 P1 = 21 µs) as the intermediate state ( Fig. 1).…”

Section: Experimental Methodsmentioning

confidence: 99%

Rydberg-blockade effects in Autler-Townes spectra of ultracold strontium

et al. 2016

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We present a combined experimental and theoretical study of the effects of Rydberg interactions on Autler-Townes spectra of ultracold gases of atomic strontium. Realizing two-photon Rydberg excitation via a long-lived triplet state allows us to probe the regime where Rydberg state decay presents the dominant decoherence mechanism. The effects of Rydberg interactions are observed in shifts, asymmetries, and broadening of the measured atom-loss spectra. The experiment is analyzed within a one-body density-matrix approach, accounting for interaction-induced level shifts and dephasing through nonlinear terms that approximately incorporate correlations due to the Rydberg blockade. This description yields good agreement with our experimental observations for short excitation times. For longer excitation times, the loss spectrum is altered qualitatively, suggesting additional dephasing mechanisms beyond the standard blockade mechanism based on pure van der Waals interactions

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“…. 100 have sizable lifetimes on the order of τ r ∼ 10 2 µs [46], which is a crucial feature of Rydberg atoms for their application in quantum information processing [47]. In the present situation, however, the production of large-N squeezed states requires even longer coherence times.…”

Section: Pacs Numbersmentioning

confidence: 99%

Spin Squeezing in a Rydberg Lattice Clock

et al. 2014

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Lifetime measurements of highly excited Rydberg states of strontium I

Cited by 17 publications

References 4 publications

Lifetimes of ultra-long-range strontium Rydberg molecules

Lifetimes of ultra-long-range strontium Rydberg molecules

Rydberg-blockade effects in Autler-Townes spectra of ultracold strontium

Spin Squeezing in a Rydberg Lattice Clock

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