论文标题
地面冷却的Cao $^{+} $和Ca $^{+} $捕获的离子链的绝热控制运动状态
Adiabatically controlled motional states of a ground-state cooled CaO$^{+}$ and Ca$^{+}$ trapped ion chain
论文作者
论文摘要
控制捕获分子离子的外部自由度是其在光谱，基本常数和量子信息技术的精确测量中的有希望应用的先决条件。在这里，我们通过与共捕获的钙离子通过交感的边带冷却钙单氧化物离子的轴向运动模式的近地面冷却。我们还表明，在模式频率上下上下时，保持离子链的轴向隔离模式的声子状态。运动模式频率的绝热渐变是搜索所提出的分子偶极子 - phonon相互作用的先决条件。
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.
