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arXiv 1302.4547quant-ph
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电子涡旋态中的自旋效应

Spin effects in electron vortex states

Ruben Van Boxem, Jo Verbeeck, Bart Partoens

摘要:

电子涡旋束最近的实验实现开辟了一个广阔的研究领域以前没有探索。本文探讨了这些电子涡旋束的相对论性质,并量化偏离标量波理论。在电子光学中,通常使用忽略自旋的薛定谔方程。本文研究了自旋和总角动量Jz的作用以及它与涡旋态的关系。作为应用,我们还研究了在透射电子显微镜中是否有可能利用全息重建来产生新的总角动量本征态。结果表明,相对论自旋耦合效应消失在傍轴极限,和自旋效应全息创建的电子涡旋束只能利用通过使用专门的磁孔。

英文摘要:

The recent experimental realization of electron vortex beams opens up a wide research domain previously unexplored. The present paper explores the relativistic properties of these electron vortex beams, and quantifies deviations from scalar wave theory. It is common in electron optics to use the Schrödinger equation neglecting spin. The present paper investigates the role of spin and the total angular momentum Jz and how it pertains to the vortex states. As an application, we also investigate if it is possible to use holographic reconstruction to create novel total angular momentum eigenstates in a Transmission Electron Microscope. It is demonstrated that relativistic spin coupling effects disappear in the paraxial limit, and spin effects in holographically created electron vortex beams can only be exploited by using specialized magnetic apertures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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