Raman sideband cooling of ^25Mg^+ -^27Al^+ ions pair and observation of quantum logic spectra [article]

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 arXiv   pre-print
We perform quantum logic spectroscopy (QLS) on ^27Al^+ ion ^1S_0 - ^3P_1 transition, which is an important step toward the QLS based ^27Al^+ ion optical clock. As a precondition of QLS, both the stretch (STR) mode and the common (COM) mode of the ^27Al^+ and ^25Mg^+ 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)
more » ... honons/s for the STR mode and 5.5(1) phonons/s for the COM mode.
arXiv:1902.09716v1 fatcat:ywk6yeumvfb35etzvff7fbyzea