Adiabatically controlled motional states of a ground-state cooled CaO${}^{+}$ and Ca${}^{+}$ trapped ion chain

Abstract

Control of the external degree of freedom of trapped molecular ions is a prerequisite for their promising applications to spectroscopy, precision measurements of fundamental constants, and quantum information technology. Here, we demonstrate near ground-state cooling of the axial motional modes of a calcium mono-oxide ion via sympathetic sideband cooling with a co-trapped calcium ion. We also show that the phonon state of the axial out-of-phase mode of the ion chain is maintained while the mode frequency is adiabatically ramped up and down. The adiabatic ramping of the motional mode frequency is a prerequisite for searching for the proposed molecular dipole-phonon interaction.

References in corpus (6)

• Enhanced sensitivity to variation of the fine structure constant and m_p/m_e in diatomic molecules
• Candidate molecular ions for an electron electric dipole moment experiment
• Proton-electron mass ratio by high-resolution optical spectroscopy of ion ensembles in the resolved-carrier regime
• A proposal for a scalable universal bosonic simulator using individually trapped ions
• Efficient sympathetic motional ground-state cooling of a molecular ion
• Sympathetic cooling of molecular ion motion to the ground state

Cited by in corpus (2)

• Photodissociation spectra of single trapped CaOH+ molecular ions
• Approximating maximum independent set on Rydberg atom arrays using local detunings