arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1507.01765cond-mat.mes-hall
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用于量子点单自旋快速电操纵的稳健微磁体设计

Robust micro-magnet design for fast electrical manipulations of single spins in quantum dots

Jun Yoneda, Tomohiro Otsuka, Tatsuki Takakura, Michel Pioro-Ladrière, Roland Brunner, Hong Lu, Takashi Nakajima, Toshiaki Obata, Akito Noiri, Christopher J. Pal… 展开作者

Jun Yoneda, Tomohiro Otsuka, Tatsuki Takakura, Michel Pioro-Ladrière, Roland Brunner, Hong Lu, Takashi Nakajima, Toshiaki Obata, Akito Noiri, Christopher J. Palmstrøm, Arthur C. Gossard, Seigo Tarucha

摘要:

将自旋耦合调整到电场是自旋电子学和基于自旋的量子信息处理的核心。我们提出了一个最佳的微磁铁设计,产生适当的杂散磁场调解快速电子自旋操纵纳米器件。我们量化了空间场不均匀性和与自旋未对准公差的实际要求,并提出了一种提高自旋旋转频率(在GaAs纳米结构中超过50 MHz)的设计方案。然后,我们验证我们的设计实验在不同的设备。我们的研究结果将开辟一条快速控制有限寿命的固态电子自旋和研究固体中的相干自旋动力学的路线。

英文摘要:

Tailoring spin coupling to electric fields is central to spintronics and spin-based quantum information processing. We present an optimal micromagnet design that produces appropriate stray magnetic fields to mediate fast electrical spin manipulations in nanodevices. We quantify the practical requirements for spatial field inhomogeneity and tolerance for misalignment with spins, and propose a design scheme to improve the spin-rotation frequency (to exceed 50MHz in GaAs nanostructures). We then validate our design by experiments in separate devices. Our results will open a route to rapidly control solid-state electron spins with limited lifetimes and to study coherent spin dynamics in solids.

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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