Adiabatically controlled motional states of a Formula Presented and Formula Presented trapped-ion chain cooled to the ground state

Control of the external degree of freedom of trapped molecular ions is essential 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 cotrapped 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/or down. The adiabatic ramping of the motional mode frequency is a prerequisite for searching for the proposed molecular dipole-phonon interaction [ W. C. Campbell and E. R. Hudson , Phys. Rev. Lett. 125, 120501 (2020)0031-9007 10.1103/PhysRevLett.125.120501 ; M. Mills , Phys. Chem. Chem. Phys. 22, 24964 (2020)1463-9076 10.1039/D0CP04574H ].

Duke Scholars

Author Kenneth R Brown Electrical and Computer Engineering