Deslauriers L, Olmschenk S, Stick D, Hensinger W K, Sterk J, Monroe C
FOCUS Center and Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
Phys Rev Lett. 2006 Sep 8;97(10):103007. doi: 10.1103/PhysRevLett.97.103007.
We measure and characterize anomalous motional heating of an atomic ion confined in the lowest quantum levels of a novel rf ion trap that features moveable electrodes. The scaling of heating with electrode proximity is measured, and when the electrodes are cooled from 300 to 150 K, the heating rate is suppressed by an order of magnitude. This provides direct evidence that anomalous motional heating of trapped ions stems from microscopic noisy potentials on the electrodes that are thermally driven. These observations are relevant to decoherence in quantum information processing schemes based on trapped ions and perhaps other charge-based quantum systems.
我们测量并表征了囚禁在具有可移动电极的新型射频离子阱最低量子能级中的原子离子的反常运动加热。测量了加热随电极接近程度的标度关系，并且当电极从300 K冷却到150 K时，加热速率被抑制了一个数量级。这提供了直接证据，表明被俘获离子的反常运动加热源于电极上由热驱动的微观噪声势。这些观测结果与基于被俘获离子以及可能其他基于电荷的量子系统的量子信息处理方案中的退相干有关。
