Precision test of the ac Stark shift in a rubidium atomic vapor

Levi, Filippo; Camparo, J. C.; Bart, François; Calosso, Claudio; Micalizio, Salvatore; Godone, A.

doi:10.1103/physreva.93.023433

Cited by 22 publications

(15 citation statements)

References 37 publications

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“…5b, we show the measured splitting ω 2 -ω 1 for the probe and conjugate spots 5 and 2, as a function of the pump power using a fixed slit size. As expected, both exhibit a linear dependence [29].…”

supporting

confidence: 82%

Multimode four-wave mixing with a spatially structured pump

et al. 2018

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We demonstrate, to the best of our knowledge, a new four-wave mixing geometry based on structured light. By utilizing near-field diffraction through a narrow slit, the pump beam is asymmetrically structured to modify the phase-matching condition, generating multimode output in both the spatial and frequency domains. We show that the frequency parameter enables selection of various spatial-mode outputs, including a twin-beam geometry, which preserves relative intensity squeezing shared between the two beams. The results suggest that the engineering of atomic states via structured light may provide a pathway to a diverse set of quantum resources based on multimode squeezed light.

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confidence: 82%

Multimode four-wave mixing with a spatially structured pump

et al. 2018

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“…Specifically, considering the residuals for all six fits, and normalizing these residuals to the largest peak-to-peak ac Stark shift in the D 2 manifold (i.e., 1.9410 -12 , which corresponds to the F g = 4  F e = 5 transition), the agreement between theory and experiment is at the 2.210 -2 level. This represents roughly a factor of two improvement in experiment/theory agreement over the results of Levi et al in a hot atomic vapor [7], and in some sense represents a more stringent test given the richer influence of the tensor light shift in the 133 Cs fountain ac Stark shift measurements.…”

Section: Resultsmentioning

confidence: 58%

“…Recently, however, Levi et al [7] were able to test the tensor light shift produced by a laser tuned near the 87 Rb D 1 transition in a hot atomic vapor, since the excited-state hyperfine splitting for the [7]. Further, as we will discuss subsequently, ac…”

Section: A General Analysismentioning

confidence: 96%

“…is the atom's polarizability dyadic, which for linearly polarized light only contributes to  LS through scalar and tensor polarizability components:  0) and  2) , respectively [5,6]. To lowest order in perturbation theory there is no difference between the QED and semiclassical theories, and to date there have been no observed discrepancies between theory and experiment [7].…”

Section: Introductionmentioning

confidence: 99%

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ac Stark shift measurements of the clock transition in cold Cs atoms: Scalar and tensor light shifts of theD2transition

et al. 2016

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“…(5.4). The light shift can be split into a scalar term with spherical symmetry (independent of the polarization of the light field), a vector term with the symmetry of a magnetic dipole interacting with a fictitious magnetic field (only present for circularly polarized light) and a tensor term corresponding to an electric quadrupole interacting with a fictitious electric field gradient [162]. Taking the z-axis as the quantization axis 27…”

Section: Multi-level Systemmentioning

confidence: 99%

Spectroscopy of Trapped ¹³⁸Ba⁺ Ions for Atomic Parity Violation and Optical Clocks

Dijck

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Trapped Ba + and Ra + ions offer the possibility to test the Standard Model by performing an independent high-precision determination of the Weinberg angle (sin 2 θ W) at low momentum transfer. In such a measurement of atomic parity violation, table-top experiments complement studies of weak interaction effects at high energy in the search for new physics. The singly-charged heavy alkaline earth metal ions combine high intrinsic sensitivity with tractable atomic structure owing to their single valence electron. In addition, trapped Ba + or Ra + ions can serve as reference for an optical atomic clock that is sensitive to variation of the fine structure constant α. Determining sin 2 θ W requires localizing a single laser-cooled Ba + or Ra + ion in a standing-wave light field to a fraction of an optical wavelength. High-precision atomic theory calculations are crucial for interpreting the measurements and need experimental input. We have performed preparatory spectroscopy measurements with trapped Ba + ions and investigated experimental techniques for characterizing ion traps. We have determined the optical transition frequencies between low-lying levels of 138 Ba + with laser spectroscopy referenced to an optical frequency comb. Using a lineshape model based on eight-level optical Bloch equations, we determined the 6s 2 S 1/2-5d 2 D 3/2 transition frequency to be 146 114 384.0(0.1) MHz and the 5d 2 D 3/2-6p 2 P 1/2 transition frequency to be 461 311 878.5(0.1) MHz, obtaining for the first time sub-MHz precision on these transitions. Light shifts play an important role in the measurement of sin 2 θ W and offer a way to obtain information on (ratios of) atomic transition matrix elements. We have carried out an exploratory study of the light shift in 138 Ba + caused by an off-resonant laser tuned close to the 5d 2 D 3/2-6p 2 P 1/2 transition. The observed spectra are analyzed by combining the optical lineshapes with calculated light shifts of individual Zeeman components. Atomic state lifetimes provide a benchmark for calculations of transition amplitudes. We have measured the lifetime of the long-lived 5d 2 D 5/2 level in 138 Ba + using a technique based on quantum jumps with one to four trapped ions. We have investigated known systematic effects in detail to evaluate their influence. We measured the lifetime of the 5d 2 D 5/2 level to be 26.3(0.6) s, which is about 4σ shorter than previously published experimental results. This discrepancy needs to be clarified to ensure the reliability of atomic parity violation measurements ahead. This work contributes toward a precise determination of sin 2 θ W with trapped Ba + or Ra + ions in search of physics beyond the Standard Model.

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Precision test of the ac Stark shift in a rubidium atomic vapor

Cited by 22 publications

References 37 publications

Multimode four-wave mixing with a spatially structured pump

Multimode four-wave mixing with a spatially structured pump

ac Stark shift measurements of the clock transition in cold Cs atoms: Scalar and tensor light shifts of theD2transition

Spectroscopy of Trapped ¹³⁸Ba⁺ Ions for Atomic Parity Violation and Optical Clocks

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