锯齿形离子晶体在横向磁场梯度中的自旋和运动动力学
Spin and motion dynamics with zigzag ion crystals in transverse magnetic field gradients
摘要：
研究了锯齿形离子晶体在横向磁场梯度中的动力学行为。采用表面电极Paul阱来捕获$^{40}$ Ca $^+$离子，并且具有浸没的导线以在离子位置处产生高达16.3（9）T/m的磁场梯度。随着梯度在垂直于最弱约束轴的方向上排列，沿线性离子晶体形成，我们证明了磁场梯度诱导自旋和离子运动之间的耦合。对于三种离子的晶体，通过它们的线性到锯齿形结构转变，我们在用射频场直接驱动自旋时进行边带光谱。此外，我们观察到丰富的激发光谱的振动模式的平面晶体由四个离子。
英文摘要：
We investigate the dynamics of ion crystals in zigzag configuration in transverse magnetic field gradients. A surface-electrode Paul trap is employed to trap $^{40}$Ca$^+$ ions and features submerged wires to generate magnetic field gradients of up to 16.3(9) T/m at the ions position. With the gradient aligned in the direction perpendicular to the axis of weakest confinement, along which linear ion crystals are formed, we demonstrate magnetic field gradient induced coupling between the spin and ion motion. For crystals of three ions across their linear-to-zigzag structural transition we perform sideband spectroscopy upon directly driving the spins with a radiofrequency field. Furthermore, we observe the rich excitation spectrum of vibrational modes in a planar crystal comprised of four ions.
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