论文标题
光学镊子中的量子模拟中微型和局部应力在量子模拟中的影响
The Effect of Micromotion and Local Stress in Quantum simulation with Trapped Ions in Optical Tweezers
论文作者
论文摘要
编程和控制交互作用的能力为在被困的离子系统中实现大规模量子模拟和计算提供了关键。最近提出，添加光学镊子可以调整声子频谱并因此修改声子介导的自旋旋转相互作用，最近被提出是针对更广泛的自旋模型编程量子模拟器的一种方式[Arias Espinoza等人。修订版A {\ bf 103}，052437]。在这项工作中，我们研究了在实验缺陷存在下发现的鲁棒性：微动，局部应力和强度噪声。我们表明，在设计和优化镊子模式以产生目标相互作用时，微动功能的影响很容易绕过。此外，虽然当地应力（镊子在单个离子上施加小力量）似乎可以进一步调整自旋旋转相互作用，但任何其他额外的灵活性都可以忽略不计。我们得出的结论是，光学镊子是一种有用的方法，用于在镊子对齐中有微动和缺陷的情况下控制捕获的离子量子模拟器中的相互作用，但需要在次级级别上进行强度稳定。
The ability to program and control interactions provides the key to implementing large-scale quantum simulation and computation in trapped ion systems. Adding optical tweezers, which can tune the phonon spectrum and thus modify the phonon-mediated spin-spin interaction, was recently proposed as a way of programming quantum simulators for a broader range of spin models [Arias Espinoza et al., Phys. Rev. A {\bf 103}, 052437]. In this work we study the robustness of our findings in the presence of experimental imperfections: micromotion, local stress, and intensity noise. We show that the effects of micromotion can be easily circumvented when designing and optimizing tweezer patterns to generate a target interaction. Furthermore, while local stress, whereby the tweezers apply small forces on individual ions, may appear to enable further tuning of the spin-spin interactions, any additional flexibility is negligible. We conclude that optical tweezers are a useful method for controlling interactions in trapped ion quantum simulators in the presence of micromotion and imperfections in the tweezer alignment, but require intensity stabilization on the sub-percent level.
