Related papers: Narrow-line-mediated Sisyphus cooling in the $^{3}\mathrm{P}

Narrow-line-mediated Sisyphus cooling in the $^{3}\mathrm{P}_{2}$ metastable state of strontium

URL: http://arxiv.org/abs/2506.19701v1
Date: Tue, 24 Jun 2025 15:12:03 GMT
Title: Narrow-line-mediated Sisyphus cooling in the $^{3}\mathrm{P}_{2}$ metastable state of strontium
Authors: Chun-Chia Chen, Ryoto Takeuchi, Shoichi Okaba, Hidetoshi Katori,
Abstract summary: We demonstrate narrow-line-mediated Sisyphus cooling of magnetically trapped strontium (Sr) in the $5s5p,3textrmP_2$ state.<n>A 641 nm standing-wave, blue-detuned from the $5s4d,3textrmD_3$ transition creates a dissipative optical lattice in the $3textrmD_3$ state.
Score: 0.08999666725996974
License: http://creativecommons.org/licenses/by-nc-nd/4.0/
Abstract: We demonstrate narrow-line-mediated Sisyphus cooling of magnetically trapped strontium (Sr) in the $5s5p\,^{3}\textrm{P}_{2}$ state. A 641 nm standing-wave, blue-detuned from the $5s4d\,^{3}\textrm{D}_{3}$$\,\rightarrow$ $\,5p4d\,^{3}\textrm{F}_{4}$ transition, creates a dissipative optical lattice in the $^{3}\textrm{D}_{3}$ state. By combining Doppler cooling and Sisyphus cooling on the $5s5p\,^{3}\textrm{P}_{2}$$\,\rightarrow$ $5s4d\,^{3}\textrm{D}_{3}$ transition at 2.92 ${\mu}$m, we observed efficient cooling of magnetically trapped atoms. By optically pumping the atoms to the $5s5p\,^{3}\textrm{P}_{0}$ state, we facilitate continuous outcoupling via a moving optical lattice with two fold improvement in atom number. Our scheme applies to next-generation quantum sensors using continuous ultracold atomic beams.

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