Towards a magnesium optical lattice clock

Rühmann, S.; Riedmann, M.; Wübbena, T.; Kulosa, A. P.; Pape, A.; Fim, Dominika; Zipfel, Klaus; Lampmann, Birte; Friebe, J.; Kelkar, Hrishikesh; Ertmer, W.; Rasel, Ernst M.

doi:10.1109/cleoe.2011.5943301

Cited by 2 publications

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“…In this way spectral linewidths as narrow as 290 Hz were resolved, and an absolute frequency measurement with an uncertainty of 7 × 10 −14 was performed [138,109]. Second-stage cooling has proved difficult in Mg [139], but there remain good prospects for use of Mg in an optical lattice (the magic wavelength for the 1 S 0 → 3 P 0 transition is predicted to be 463 nm) [140], where its smaller BBR shift could give it an advantage over existing lattice-clock systems.…”

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confidence: 99%

Optical atomic clocks

Poli,

Oates,

Gill

et al. 2014

Preprint

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In the last ten years extraordinary results in time and frequency metrology have been demonstrated. Frequency-stabilization techniques for continuous-wave lasers and femto-second optical frequency combs have enabled a rapid development of frequency standards based on optical transitions in ultra-cold neutral atoms and trapped ions. As a result, today's best performing atomic clocks tick at an optical rate and allow scientists to perform high-resolution measurements with a precision approaching a few parts in 10 18 . This paper reviews the history and the state of the art in optical-clock research and addresses the implementation of optical clocks in a possible future redefinition of the SI second as well as in tests of fundamental physics.PACS 06.30.Ft -Time and frequency. PACS 06.20.fb -Frequency standards. PACS 37.10.Jk -Optical cooling and trapping of atoms. PACS 37.10.Ty -Ion trapping.

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mentioning

confidence: 99%

Optical atomic clocks

Poli,

Oates,

Gill

et al. 2014

Preprint

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“…Currently, all the demonstrated space-borne cold atom clocks and BEC are based on alkali atoms [1,7,12]. However, neutral atom optical clocks are based on alkaline earth(-like) atoms, such as Mg [16], Ca [17], Sr [18,19], Yb [20], and Hg [21], some of which are also interested in BEC [22][23][24]. A distinctive advantage of these alkaline earth(-like) atoms over alkali atoms is the existence of spin-forbidden transition of 1 S 0 − 3 P 1 by which one can perform a narrow-line laser cooling [25,26].…”

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confidence: 99%

Analysis of Narrow-Line Laser Cooling and Trapping of Sr Atoms in Microgravity Environments

Ren

Liu

et al. 2020

Applied Sciences

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Obtaining ultracold alkaline earth(-like) atoms in space encounters the problem of performing narrow-line laser cooling in microgravity environments ( μ -gEs). This paper reports an analysis of the magneto-optical trap (MOT) based on the narrow-line transition in 88 Sr, while paying special attention to the role of the gravity. This analysis suggests the MOTs based on narrow-line transitions cannot be cold and dense enough in a μ -gE. We thus propose a strategy: that one can use a dual-frequency MOT to realize a low-temperature, high density, and high transfer efficiency, narrow-line red MOT in μ -gEs.

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Towards a magnesium optical lattice clock

Cited by 2 publications

References 1 publication

Optical atomic clocks

Optical atomic clocks

Analysis of Narrow-Line Laser Cooling and Trapping of Sr Atoms in Microgravity Environments

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