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DiBerardino, Diana; Tanner, Carol E.; Sieradzan, A.

doi:10.1103/physreva.57.4204

Cited by 33 publications

(44 citation statements)

References 19 publications

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“…The theoretical values differ substantially, by over 5%, from the experimental results (we note that that the experimental values from Refs. [10,11] differ by 4%, which exceeds their stated uncertainties of 0.7% and 1%, respectively). One possible source of such a discrepancy is the contribution of the 5d − 6s electric-quadrupole transition to the 5d lifetime.…”

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confidence: 73%

“…Thus, it is possible to check consistency between polarizability and lifetime measurements by deriving 5d − 6p matrix elements from 5d lifetime measurements and substituting these values into the 6p polarizability calculations. For either of the two experimental lifetimes, [10,11] this procedure yields a result that disagrees with directly measured polarizabilities [12,13,14] by several standard deviations.The particular all-order method used here is the linearized coupled-cluster method which sums infinite sets of many-body perturbation theory terms. We refer the reader to Refs.…”

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confidence: 83%

“…First, we use experimental 5d lifetimes from [10] to determine the 5d−6p reduced matrix elements. Inverting Eq.…”

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confidence: 99%

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Inconsistencies between lifetime and polarizability measurements in Cs

Safronova

Clark

2004

Phys. Rev. A

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Electric-dipole matrix elements for 6p −nd, n = 5, 6, 7 transitions in cesium are calculated using a relativistic all-order method. The resulting matrix elements are used to evaluate 5d lifetimes and 6p polarizabilities. The data are compared with experimental lifetime and polarizability measurements made by different groups. Domination of the 6p scalar polarizabilities by 5d − 6p dipole matrix elements facilitates an exacting consistency check of 5d lifetime and 6p polarizability data. Values of 5d − 6p matrix elements obtained from experimental 5d lifetime data are found to be inconsistent with those inferred from 6p polarizabilities derived from experimental Stark shift data. Our ab initio calculated 6p polarizabilities agree well with experimental determinations.PACS numbers: 31.15. Ar, 32.70.Cs, 32.10.Dk, 31.15.Dv The understanding of the accuracy of ab initio calculations in cesium is vital for the analysis of the Cs parity nonconservation (PNC) experiment [1]. In 1999, motivated by a number of recent high-precision experiments, Bennett and Wieman [2] reanalyzed the agreement of theoretical calculations and experimental data for a number of Cs atomic properties and reduced the previous theoretical uncertainty in the PNC amplitude by a factor of two. Utilizing measurements of the tensor transition polarizability, β, reported in same work, they demonstrated a 2.5σ discrepancy between the value of the weak charge Q W predicted by the Standard Model and that derived from the Cs PNC experiment. Although several papers (for example, [3,4,5,6,7,8,9]), have addressed this disagreement since 1999, the issue of the accuracy of ab initio calculations in Cs continues to be of interest.In this work, we investigate the radiative properties of Cs 6p − nd transitions. Although these do not bear directly on PNC experiments done to date, they have been the subject of careful experimental investigation, and thus provide benchmarks for precise comparison of theory and experiment. In particular, there exist two independent measurements of the lifetimes of the 5d states [10,11], which do not agree within their stated uncertainties. There also exist several experimental determinations of the 6p − 6s Stark shifts which allow to infer the values of polarizabilities of the 6p states [12,13,14]. Here we show that ab initio theory can check the mutual consistency of 5d lifetime and 6p polarizability data, with an accuracy of about 1%. We find the lifetime and polarizability results to be inconsistent at this level. Our calculations agree with the experimental values of 6p polarizabilities, but deviate from both determinations of the 5d lifetimes. We suggest that further experiments are desirable in order to clarify this issue. In addition, * Electronic address: msafrono@physics.udel.edu; Current address: Department of Physics and Astronomy, University of Delaware, Newark, Delaware, 19716 understanding of the accuracy of the 5d state properties in Cs is germane to the ongoing PNC experiment in isoelectronic Ba + [15], since the ...

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Inconsistencies between lifetime and polarizability measurements in Cs

Safronova

Clark

2004

Phys. Rev. A

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“…Since this is the second closest blue-detuned magic wavelength to 852 nm, it has the second highest ground-state polarizability and therefore requires the second lowest optical intensity to generate the required trapping potential (we do not consider the magic wavelength at 792 nm, as it is too close to the 8S 1/2 to 6P 3/2 transition at 794 nm). We have neglected higher order processes in our analysis, including two-photon and electric quadrupole transitions, near 687 nm [50]. Figure 6.…”

Section: Magic Wavelengths For An Evanescent Field Trapmentioning

confidence: 99%

Demonstration of a State-Insensitive, Compensated Nanofiber Trap

et al. 2012

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Abstract. Laser trapping and interfacing of laser-cooled atoms in an optical fiber network is an important capability for quantum information science. Following the pioneering work of Balykin et al. and Vetsch et al., we propose a robust method of trapping single Cesium atoms with a two-color state-insensitive evanescent wave around a dielectric nanofiber. Specifically, we show that vector light shifts (i.e., effective inhomogeneous Zeeman broadening of the ground states) induced by the inherent ellipticity of the forward-propagating evanescent wave can be effectively canceled by a backward-propagating evanescent wave. Furthermore, by operating the trapping lasers at the magic wavelengths, we remove the differential scalar light shift between ground and excited states, thereby allowing for resonant driving of the optical D 2 transition. This scheme provides a promising approach to trap and probe neutral atoms with long trap and coherence lifetimes with realistic experimental parameters. † These authors contributed equally to this work.

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“…This E2 line has a transition rate of γ 5D−6S = 2π · 3.5 Hz [8]. Considering solely fluorescence decay, the saturation intensity behaves like I s = ∼ 2 Wcm −2 , where γ se 5D = 2π · 124 kHz is the fluorescence rate of 5D 5/2 state which almost exclusively comes from the 5D 5/2 → 6P 3/2 E1 line at 3.5 µm [22]. The 685 nm laser has an output power of 11 mW and a minimum beam waist around ω 0 = 125 µm.…”

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Doppler-free approach to optical pumping dynamics in the 6S_1/2−5D_5/2 electric quadrupole transition of cesium vapor

et al. 2016

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The 6S 1/2 − 5D 5/2 electric quadrupole transition is investigated in Cesium vapor at room temperature via nonlinear Doppler-free 6P-6S-5D three-level spectroscopy. Frequency-resolved studies of individual E2 hyperfine lines allow one to analyze optical pumping dynamics, polarization selection rules and line intensities. It opens the way to studies of transfer of light orbital angular momentum to atoms, and the influence of metamaterials on E2 line spectra. © 2018 Optical Society of America OCIS codes: (020.2930) Hyperfine structure; (300.6420) Spectroscopy, nonlinear; (300.6210) Spectroscopy, atomic; (140.0140) Lasers and laser optics http://dx.doi.org/10.1364/OL.41.002005With the appearance of laser sources, nonlinear Doppler-free Laser Spectroscopy (DFLS) has undergone a very fast development. It has been utilized for atomic and molecular spectral analyses, collisional studies in the vapor phase and investigation of fundamental processes [1,2]. Up to now, in atomic physics, DFLS has been mainly performed by using laser sources resonant for electric-dipole (E1) transitions. Dipoleforbidden transitions, particularly electric quadrupole (E2) transitions, are important in new avenues of atomic physics for fundamental studies like parity violation [3] or devising of ultrahigh-accuracy optical clocks [4][5][6]. Spectroscopic studies of E2 transitions in vapors are generally hindered by Dopplerbroadening, and in most cases averaged over the internal structure of the E2 transition (e.g. hyperfine multiplets) [7,8]. A noteworthy exception is the early work by Weber and Sansonetti [9] who performed resonantly enhanced stepwise excitation to high lying states of Cesium, using the 5D 3/2 level as the intermediates state. In this way, they have been able to get Doppler-free spectra and resolve the hyperfine lines of the 6S 1/2 − 5D 3/2 E2 transition. Recent studies include Dopplerfree 5p-6p transitions in Rubidium [10] and magnetic-fieldmixing of forbidden hyperfine transitions of Cs D2 line [11]. Another well-explored approach to study the internal structure of highly-excited D levels of alkalis and measure their energy makes use of Doppler-free two-photon spectroscopy [12,13]. In this letter we analyze Doppler-free hyperfine spectral lines of the Cs 6S 1/2 − 5D 5/2 E2 transition, as observed via threelevel Raman-type nonlinear spectroscopy [14][15][16] on the 6P-6S-5D coupled system. We investigate polarization properties and optical pumping processes responsible for the E2 spectral line intensities, demonstrating the important role played by transit time relaxation. This work should pave the way to investigate such specific properties as transfer of non-zero e.m. orbital angular momentum to atomic systems [17,18], vapor-surface physics [7,8] and atomic gas combined with nanostructured interface [19][20][21].To investigate Doppler-free spectroscopic characteristics on an E2 transition, we address the 6S 1/2 → 6D 5/2 transition of Cesium at λ = 685 nm (Fig. 1). This E2 line has a transition rate of γ 5D−6S = 2π · 3.5...

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Lifetime measurements of cesium5d2D5/2,3/2

Cited by 33 publications

References 19 publications

Inconsistencies between lifetime and polarizability measurements in Cs

Inconsistencies between lifetime and polarizability measurements in Cs

Demonstration of a State-Insensitive, Compensated Nanofiber Trap

Doppler-free approach to optical pumping dynamics in the 6S_1/2−5D_5/2 electric quadrupole transition of cesium vapor

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