Surface science for improved ion traps
Surface science for improved ion traps
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DOI：
10.1557/mrs.2013.207
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发表时间：
2013-10-01
期刊：
影响因子：
5
通讯作者：
Pappas, D. P.
中科院分区：
文献类型：
--
作者：
Hite, D. A.;Colombe, Y.;Pappas, D. P.
捕获离子对来自捕获电极表面的电场噪声敏感。十多年来，这种噪声一直是束缚离子量子信息处理（QIP）实验进展的障碍。它引起离子的运动加热，从而导致量子态退相干。这种加热是异常的，因为它不容易用典型的技术噪声源来解释。其依赖于离子电极距离，频率和电极温度的实验证据指向表面，而不是体积，陷阱电极的起源。在本文中，我们回顾了实验努力和模型，以帮助识别和减少或消除异常加热的来源。最近通过原位清洗减少加热的进展表明，这可能不是捕获离子QIP的基本限制。此外，捕获离子对电场噪声的极端敏感性可能被用作表面科学的新工具。
Trapped ions are sensitive to electric-field noise from trap-electrode surfaces. This noise has been an obstacle to progress in trapped-ion quantum information processing (QIP) experiments for more than a decade. It causes motional heating of the ions, and thus quantum-state decoherence. This heating is anomalous because it is not easily explained by typical technical-noise sources. Experimental evidence of its dependence on ion-electrode distance, frequency, and electrode temperature points to the surface, rather than the bulk, of the trap electrodes as the origin. In this article, we review experimental efforts and models to help identify and reduce or eliminate the source of the anomalous heating. Recent progress to reduce the heating with in situ cleaning indicates that it may not be a fundamental limit to trapped-ion QIP. Moreover, the extreme sensitivity of trapped ions to electric-field noise may potentially be used as a new tool in surface science.