论文标题
探测带有捕获离子的光纤上的表面电荷密度
Probing surface charge densities on optical fibers with a trapped ion
论文作者
论文摘要
我们描述了一种新的方法，可以测量放置在被困离子附近的光纤上的表面电荷密度，在该离子的附近，离子本身充当探针。表面电荷会扭曲捕获电势，当纤维移位时，离子的平衡位置和世俗的运动频率会改变。我们测量了纤维不同位置的后一个量，并将这些测量值与模拟进行了比较，在该模拟中，纤维上未知的电荷密度是可调参数。确定了从$ -10 $到$+50 $ e/$ m $^2 $的值。我们的结果将有益于将离子陷阱和集成光学元件组合的微型实验系统的设计和仿真，例如在量子计算，通信和计量学领域。此外，我们的方法可以应用于任何相对于陷阱电荷敏感粒子的介电元件的设置。
We describe a novel method to measure the surface charge densities on optical fibers placed in the vicinity of a trapped ion, where the ion itself acts as the probe. Surface charges distort the trapping potential, and when the fibers are displaced, the ion's equilibrium position and secular motional frequencies are altered. We measure the latter quantities for different positions of the fibers and compare these measurements to simulations in which unknown charge densities on the fibers are adjustable parameters. Values ranging from $-10$ to $+50$ e/$μ$m$^2$ were determined. Our results will benefit the design and simulation of miniaturized experimental systems combining ion traps and integrated optics, for example, in the fields of quantum computation, communication and metrology. Furthermore, our method can be applied to any setup in which a dielectric element can be displaced relative to a trapped charge-sensitive particle.
