Doppler cooling to the recoil limit by means of sharp atomic transitions with controlled quenching

Zehnlé, Véronique; Garreau, Jean Claude

doi:10.1364/josab.20.000931

Cited by 3 publications

(2 citation statements)

References 19 publications

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“…Hz, and there is no suitable quenching transition for Al + ion [33][34][35][36]. As a consequence, the 267 nm laser cooling rate is too small to be effective.…”

mentioning

confidence: 99%

Direct Laser Cooling Al${}^{+}$ Ion Optical Clocks

Zhang¹,

Deng²,

Luo³

et al. 2017

Chinese Phys. Lett.

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Al + ions optical clock is a very promising optical frequency standard candidate due to its extremely small blackbody radiation shift. It has been successfully demonstrated with indirect cooled, quantum-logic-based spectroscopy technique. Its accuracy is limited by second-order Doppler shift, and its stability is limited by the number of ions that can be probed in quantum logic processing.We propose a direct laser cooling scheme of Al + ions optical clocks where both the stability and accuracy of the clocks are greatly improved. In the proposed scheme, two Al + ions traps are utilized. The first trap is used to trap a large number of Al + ions to improve the stability of the clock laser, while the second trap is used to trap a single Al + ions to provide the ultimate accuracy.Both traps are cooled with a continuous wave 167 nm laser. The expected clock laser stability can reach 9.0 × 10 −17 / √ τ . For the second trap, in addition to 167 nm laser Doppler cooling, a second stage pulsed 234 nm two-photon cooling laser is utilized to further improve the accuracy of the clock laser. The total systematic uncertainty can be reduced to about 1 × 10 −18 . The proposed Al + ions optical clock has the potential to become the most accurate and stable optical clock.

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“…Hz, and there is no suitable quenching transition for Al + ion [33][34][35][36]. As a consequence, the 267 nm laser cooling rate is too small to be effective.…”

mentioning

confidence: 99%

Direct Laser Cooling Al${}^{+}$ Ion Optical Clocks

Zhang¹,

Deng²,

Luo³

et al. 2017

Chinese Phys. Lett.

View full text Add to dashboard Cite

show abstract

“…The transitions of narrow width or of the width influenced externally are considered as candidates for use in the Doppler cooling with the aim to approach the recoil limit (Eq. (22)) of the temperature [30]. …”

Section: Ii4 Doppler Cooling Limitmentioning

confidence: 99%