Dispersion and polarization interactions of the strontium atom

Mitroy, Jim; Zhang, Jun‐Yi

doi:10.1080/00268976.2010.501766

Cited by 26 publications

(47 citation statements)

References 67 publications

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“…An experimental value was used for the 5s 2 1 S e -5s5p 1 P o matrix element [20] and the energy differences for the low-lying excitations were set to the experimental energies. This matrix element set was used to calculate dispersion coefficients between two strontium atoms, and also between strontium and the rare gases [13]. Tables II and III give the line strengths for a number of the low-lying transitions of the alkaline-earth metals comparing with available experimental and theoretical information.…”

Section: Formulationmentioning

confidence: 99%

“…The use of such large basis sets means that the error due to incompleteness of the basis is typically very small. Details of the calculations used to represent Be, Mg, Ca and Sr have been previously described [9][10][11][12][13]. We refer to these semi-empirical models of atomic structure as the configuration interaction plus core polarization (CICP) model in the subsequent text.…”

Section: Formulationmentioning

confidence: 99%

“…(6) was taken as an average of the s, p, d and f cutoff parameters. The specific values are detailed elsewhere [9][10][11][12][13]. There appears to be no experimental or theoretical data available for the strontium 5s 2 1 S e → 5s6p 3 P o 1 transition [35].…”

Section: Formulationmentioning

confidence: 99%

“…The transition arrays for the alkaline earth atoms are essentially those used in previous calculations of the polarizabilities and dispersion coefficients for these atoms [9][10][11][12][13]. These were computed with a frozen core configuration interaction (CI) method.…”

Section: Formulationmentioning

confidence: 99%

“…The atomic parameters that determine the values of the longest tune-out wavelengths are identified. The calculations utilize tables of matrix elements from earlier calculations of polarizabilities and dispersion coefficients [9][10][11][12][13]. These were computed using a non-relativistic semi-empirical fixed core approach that has been applied to the description of many one and two electron atoms [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Tune-out wavelengths for the alkaline-earth-metal atoms

2013

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The lowest 3 tune-out wavelengths of the four alkaline-earth atoms, Be, Mg, Ca and Sr are determined from tabulations of matrix elements produced from large first principles calculations. The tune-out wavelengths are located near the wavelengths for 3 P o 1 and 1 P o 1 excitations. The measurement of the tune-out wavelengths could be used to establish a quantitative relationship between the oscillator strength of the transition leading to existence of the tune-out wavelength and the dynamic polarizability of the atom at the tune-out frequency. The longest tune-out wavelengths for Be, Mg, Ca, Sr, Ba and Yb are 454.9813 nm, 457.2372 nm, 657.446 nm, 689.200 nm, 788.875 nm and 553.00 nm respectively.

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Section: Formulationmentioning

confidence: 99%

Section: Formulationmentioning

confidence: 99%

Section: Formulationmentioning

confidence: 99%

Section: Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tune-out wavelengths for the alkaline-earth-metal atoms

2013

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Effective oscillator strength distributions of spherically symmetric atoms for calculating polarizabilities and long-range atom–atom interactions

Jiang¹,

Mitroy²,

Cheng³

et al. 2015

Atomic Data and Nuclear Data Tables

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Effective oscillator strength distributions are systematically generated and tabulated for the alkali atoms, the alkaline-earth atoms, the alkaline-earth ions, the rare gases and some miscellaneous atoms. These effective distributions are used to compute the dipole, quadrupole and octupole static polarizabilities, and are then applied to the calculation of the dynamic polarizabilities at imaginary frequencies. These polarizabilities can be used to determine the long-range C 6 , C 8 and C 10 atom-atom interactions for the dimers formed from any of these atoms and ions, and we present tables covering all of these combinations.

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Half-minute-scale atomic coherence and high relative stability in a tweezer clock

Young

Eckner

Milner

et al. 2020

Nature

188

140

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The preparation of large, low-entropy, highly coherent ensembles of identical quantum systems is foundational for many studies in quantum metrology [1], simulation [2], and information [3]. Here, we realize these features by leveraging the favorable properties of tweezer-trapped alkaline-earth atoms [4][5][6] while introducing a new, hybrid approach to tailoring optical potentials that balances scalability, high-fidelity state preparation, site-resolved readout, and preservation of atomic coherence. With this approach, we achieve trapping and optical clock excited-state lifetimes exceeding 40 seconds in ensembles of approximately 150 atoms. This leads to half-minute-scale atomic coherence on an optical clock transition, corresponding to quality factors well in excess of 10 16 . These coherence times and atom numbers reduce the effect of quantum projection noise to a level that is on par with leading atomic systems [7,8], yielding a relative fractional frequency stability of 5.2(3) × 10 −17 (τ /s) −1/2 for synchronous clock comparisons between sub-ensembles within the tweezer array. When further combined with the microscopic control and readout available in this system, these results pave the way towards long-lived engineered entanglement on an optical clock transition [9] in tailored atom arrays.

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Dispersion and polarization interactions of the strontium atom

Cited by 26 publications

References 67 publications

Tune-out wavelengths for the alkaline-earth-metal atoms

Tune-out wavelengths for the alkaline-earth-metal atoms

Effective oscillator strength distributions of spherically symmetric atoms for calculating polarizabilities and long-range atom–atom interactions

Half-minute-scale atomic coherence and high relative stability in a tweezer clock

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