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arXiv 1202.1674cond-mat.mes-hall
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门控半导体纳米器件中重空穴自旋量子比特的自旋轨道调控

Spin Orbit Mediated Manipulation of Heavy Hole Spin Qubit in Gated Semiconductor Nanodevices

P. Szumniak, S. Bednarek, B. Partoens, F. M. Peeters

摘要:

提出了一种新的自旋电子学纳米器件,它能够以相干的方式操纵单个重空穴自旋态。它可以充当单个量子逻辑门。重空穴自旋转换是通过在纳米器件顶部沉积的金属栅极所限定的闭环周围传输空穴来实现的。该设备利用Dresselhaus自旋轨道相互作用,将空穴的空间运动转化为自旋的旋转。所提出的量子门在亚纳秒时间尺度上操作,并且仅需要施加弱静态电压,这允许单独寻址重空穴自旋量子比特。我们的研究结果得到了四带Luttinger-Kohn模型的量子力学含时计算的支持。

英文摘要:

A novel spintronic nanodevice is proposed that is capable to manipulate the single heavy hole spin state in a coherent manner. It can act as a single quantum logic gate. The heavy hole spin transformations are realized by transporting the hole around closed loops defined by metal gates deposited on top of the nanodevice. The device exploits Dresselhaus spin orbit interaction which translates the spatial motion of the hole into a rotation of the spin. The proposed quantum gate operates on sub nanosecond time scales and requires only the application of a weak static voltage which allows for addressing heavy hole spin qubit individually. Our results are supported by quantum mechanical time dependent calculations within the four band Luttinger Kohn model.

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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