Application of the Continuous Stern-Gerlach Effect for Laser Spectroscopy of the 
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 Fine Structure in a Penning Trap

Egl, Alexander; Arapoglou, Ioanna; Höcker, Martin; König, Kristian; Ratajczyk, Tim; Sailer, Tim; Tu, Bingsheng; Weigel, Andreas; Blaum, Klaus; Nörtershäuser, W.; Sturm, Sven

doi:10.1103/physrevlett.123.123001

Cited by 40 publications

(30 citation statements)

References 41 publications

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“…An even higher accuracy can be achieved for a frequency region of interest by a distinctive characterization of the wavelength meter with a comb exactly for this frequency. This was demonstrated for a high-precision experiment on trapped Ar 13+ ions [21] in Heidelberg, Germany. Before and after the experiment, the WSU2 was compared to the comb at TU Darmstadt.…”

Section: Wavelength-dependent Adjustment Curvesmentioning

confidence: 87%

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On the performance of wavelength meters: Part 2—frequency-comb based characterization for more accurate absolute wavelength determinations

et al. 2020

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Wavelength meters are widely used for frequency determinations and stabilization purposes since they cover a large wavelength range, provide a high read-out rate and have specified accuracies of up to 10 −8 . More accurate optical frequency measurements can be achieved with frequency combs but only at the price of considerably higher costs and complexity. In the context of precise and accurate frequency determinations for high-resolution laser spectroscopy, the performance of five different wavelength meters was quantified with respect to a frequency comb. The relative precision as well as the absolute accuracy has been investigated in detail, allowing us to give a sophisticated uncertainty margin for the individual instruments. We encountered a prominent substructure on the deviation between both device types with an amplitude of a few MHz that is repeating on the GHz scale. This finally limits the precision of laser scans which are monitored and controlled with wavelength meters. While quantifying its uncertainty margins, we found a high temporal stability in the characteristics of the wavelength meters which enables the preparation of wavelength-dependent adjustment curves for wide-and short-ranged scans. With this method, the absolute accuracy of wavelength meters can be raised up to the MHz level independently from the wavelength of the reference laser used for calibrating the device. Since this technique can be universally applied, it can lead to benefits in all fields of wavelength meter applications.

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Section: Wavelength-dependent Adjustment Curvesmentioning

confidence: 87%

“…These observations together with the need for reliable frequency measurements with wavelength meters in projects at GSI Darmstadt and MPIK Heidelberg [21] motivated this intense study of the wavelength meters.…”

Section: Introductionmentioning

confidence: 99%

On the performance of wavelength meters: Part 2—frequency-comb based characterization for more accurate absolute wavelength determinations

et al. 2020

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“…At the same time, averaging over the Zeeman components on the second rather than minute timescale will suppress systematic uncertainties arising from drifting magnetic fields 51 . 40 Ar 13+ in a Penning trap was published 52 . is prepared (see also Fig.…”

Section: Discussionmentioning

confidence: 99%

Coherent laser spectroscopy of highly charged ions using quantum logic

Micke

Leopold

King

et al. 2020

Nature

121

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Precision spectroscopy of atomic systems 1 is an invaluable tool for the advancement of our understanding of fundamental interactions and symmetries 2. Recently, highly charged ions (HCI) have been proposed for sensitive tests of physics beyond the Standard Model 2-5 and as candidates for high-accuracy atomic clocks 3,5. However, the implementation of these ideas has been hindered by the parts-per-million level spectroscopic accuracies achieved to date 6-8. Here, we cool a trapped HCI to the lowest reported temperatures, and introduce coherent laser spectroscopy on HCI with an eight orders of magnitude leap in precision. We probe the forbidden optical transition in 40 Ar 13+ at 441 nm using quantum-logic spectroscopy 9,10 and measure both its excited-state lifetime and g-factor. Our work ultimately unlocks the potential of HCI, a large, ubiquitous atomic class, for quantum information processing, novel frequency standards, and highly sensitive tests of fundamental physics, such as searching for dark matter candidates 11 or violations of fundamental symmetries 2. Alike a microscope aimed at the quantum world, laser spectroscopy pursues ever higher resolving power. Every increase in resolution enables deeper insights into the subtle effects that all known fundamental interactions have on the atomic wave function. Advances in optical frequency metrology have dramatically improved resolution in the last three decades 1 , and are making laser spectroscopy an extremely sensitive tool for studying open physics questions such as the nature of dark matter, the strength of parity violation, or a possible violation of Einstein's theory of relativity 2. However, only a few atomic and ionic species are currently within the reach of cutting-edge optical frequency metrology. Expanding this field of exploration to systems with high sensitivity to such effects is therefore crucial. Due to their extreme properties, highly charged ions (HCI) are promising candidates for such fundamental tests. Contributions from special

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“…Highly charged ions are commonly studied in research on fundamental physical systems. They can be used for highprecision tests of quantum electrodynamics (QED) [1][2][3][4][5], for the precise determination of fundamental constants [6][7][8][9][10], and in the search for the possible variation of the latter [11][12][13]. For these high-precision tests, very accurate experimental and theoretical results are both needed.…”

Section: Introductionmentioning

confidence: 99%

Self-energy-corrected Dirac wave functions for advanced QED calculations in highly charged ions

et al. 2020

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The procedure for the calculation of the self-energy-corrected wave function of the bound electron in the field of the nucleus is discussed. We present the related formulas and discuss the numerical difficulties and the methods used to overcome them. The results of the calculation are presented for a wide range of ions. Possible applications of the numerically obtained wave functions are discussed.

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Application of the Continuous Stern-Gerlach Effect for Laser Spectroscopy of the Ar13+40 Fine Structure in a Penning Trap

Cited by 40 publications

References 41 publications

On the performance of wavelength meters: Part 2—frequency-comb based characterization for more accurate absolute wavelength determinations

On the performance of wavelength meters: Part 2—frequency-comb based characterization for more accurate absolute wavelength determinations

Coherent laser spectroscopy of highly charged ions using quantum logic

Self-energy-corrected Dirac wave functions for advanced QED calculations in highly charged ions

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