Abstract:We perform quantum logic spectroscopy (QLS) on 27 Al + ion 1 S0 -3 P1 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 S… Show more
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