标题： 快速离子晶体在分段保罗陷阱中的动力学与控制 显示英文标题

标题： Dynamics and control of fast ion crystal splitting in segmented Paul traps

摘要： 我们理论研究了在分段Paul陷阱中分裂双离子晶体的过程，即从两个离子被限制在一个共同势阱中到离子被限制在不同势阱中的结构转变。通过向陷阱各段施加合适的电压斜坡来精确控制这一过程并不简单，因为在该过程中谐波约束会暂时消失。这使得离子对背景电场噪声以及沿陷阱轴方向的静态偏移场非常敏感。我们分析了为何会发生大的能量转移，这些原因包括脉冲加速、残留背景场的存在以及异常加热的增强。对于脉冲加速，我们确定了绝热和非绝热区域，这两个区域的能量转移随时间的变化行为不同。我们提出了一种基于实验可获取参数的合适控制方案。通过模拟验证了分裂结果的高度敏感性以及我们控制方案的性能。最后，我们分析了陷阱几何参数对晶体分裂过程的影响。 显示英文摘要

摘要： We theoretically investigate the process of splitting two-ion crystals in segmented Paul traps, i.e. the structural transition from two ions confined in a common well to ions confined in separate wells. The precise control of this process by application of suitable voltage ramps to the trap segments is non-trivial, as the harmonic confinement transiently vanishes during the process. This makes the ions strongly susceptible to background electric field noise, and to static offset fields in the direction of the trap axis. We analyze the reasons why large energy transfers can occur, which are impulsive acceleration, the presence of residual background fields and enhanced anomalous heating. For the impulsive acceleration, we identify the diabatic and adiabatic regimes, which are characterized by different scaling behavior of the energy transfer with respect to time. We propose a suitable control scheme based on experimentally accessible parameters. Simulations are used to verify both the high sensitivity of the splitting result and the performance of our control scheme. Finally, we analyze the impact of trap geometry parameters on the crystal splitting process.