Motional resonances of three-dimensional dual-species Coulomb crystals

Abstract

We investigate the motional resonances of dual-species Coulomb crystals comprised of ${}^9$Be${}^{+}$ and ${}^{24}$Mg${}^{+}$ ions held in a 4-rod linear Paul trap. Our experimental data and simulations show that the secular motion of such mixed crystals has rich dynamics. Their secular spectra can differ significantly from those of pure ion crystals. We propose a simple model based on mechanical coupling with Coulomb interactions between the two different ion species that explains many features of the secular spectrum. Our findings contribute to a more reliable identification of the ion species in mixed crystals.

References in corpus (9)

• 1.5 $\mu$m lasers with sub 10 mHz linewidth
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Cited by in corpus (2)

• Number-Resolved Detection of Dark Ions in Coulomb Crystals
• Domain formation and structural stabilities in mixed-species Coulomb crystals induced by sympathetically cooled highly charged ions