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arXiv · 1902.09716

Raman sideband cooling of $^{25}$Mg$^+$ -$^{27}$Al$^+$ ions pair and observation of quantum logic spectra

Hong-Li Liu·Ze-Tian Xu·Zhi-Yu Ma·Wen-Zhe Wei·Peng Hao·Wen-Hao Yuan·Huang Che·Fei-Hu Cheng·Zhi-Yuan Wang·Ke Deng·Ze-Huang Lu
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Abstract

We perform quantum logic spectroscopy (QLS) on $^{27}$Al$^+$ ion $^1$S$_0$ - $^3$P$_1$ transition, which is an important step toward the QLS based $^{27}$Al$^+$ ion optical clock. As a precondition of QLS, both the stretch (STR) mode and the common (COM) mode of the $^{27}$Al$^+$ and $^{25}$Mg$^+$ ions pair are cooled to the vibrational ground state by Raman sideband cooling. The mean phonon number is measured to be 0.10(1) for the STR mode and 0.01(1) for the COM mode, respectively. The heating rate is evaluated to be 13(3) phonons/s for the STR mode and 5.5(1) phonons/s for the COM mode.

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Hong-Li Liu, Ze-Tian Xu, Zhi-Yu Ma, Wen-Zhe Wei, Peng Hao, Wen-Hao Yuan, Huang Che, Fei-Hu Cheng, Zhi-Yuan Wang, Ke Deng, Ze-Huang Lu. 2019-02-26. Raman sideband cooling of $^{25}$Mg$^+$ -$^{27}$Al$^+$ ions pair and observation of quantum logic spectra. https://arxiv.org/abs/1902.09716

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