Inelastic electron vortex beam scattering
Inelastic electron vortex beam scattering
复制标题
非弹性电子涡旋束散射
DOI：
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
J. Verbeeck
中科院分区：
文献类型：
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作者：
R. V. Boxem;B. Partoens;J. Verbeeck
电子涡旋束物理学领域最近的理论和实验发展提出了一个问题，即电子显微镜（以及其他领域，如粒子物理学）领域的这一新奇事物究竟能提供什么？这些问题的答案的一个重要部分在于散射理论。本研究探讨了具有轨道角动量的圆柱对称光束的非弹性量子散射理论的各个方面。氢原子上的库仑散射模型系统为解决各种悬而未决的问题提供了条件：动量是如何传递的？涡束有选择性地激发原子吗？如何利用涡束来探测磁跃迁？本文提出的分析方法为这些问题提供了答案。OAM转移是可能的，但不能通过选择性激发；相反，通过预选择和后选择，可以过滤掉对特定信号的相关贡献。
Recent theoretical and experimental developments in the field of electron vortex beam physics have raised questions on what exactly this novelty in the field of electron microscopy (and other fields, such as particle physics) really provides. An important part in the answer to those questions lies in scattering theory. The present investigation explores various aspects of inelastic quantum scattering theory for cylindrically symmetric beams with orbital angular momentum. The model system of Coulomb scattering on a hydrogen atom provides the setting to address various open questions: How is momentum transferred? Do vortex beams selectively excite atoms, and how can one employ vortex beams to detect magnetic transitions? The analytical approach presented here provides answers to these questions. OAM transfer is possible, but not through selective excitation; rather, by pre- and post-selection one can filter out the relevant contributions to a specific signal.
影响因子：
8.6
作者：
Bliokh, Konstantin Yu.;Bliokh, Yury P.;Nori, Franco
通讯作者：
Nori, Franco