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arXiv 1507.03120quant-ph
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电子在电场中散射引起的磁性杂质的纠缠

Entanglement of magnetic impurities through electron scattering in an electric field

Oscar Lazo-Arjona, Guillermo Cordourier-Maruri, Romeo de Coss

摘要:

我们表明,通过电子散射产生的两个遥远的磁性杂质之间的纠缠,可以很容易地调制通过控制施加的外部电场的大小。我们假设这两个磁性杂质是固定的,位于一维量子线上。穿过金属丝的弹道电子会被两种杂质散射,因此电子自旋可以被视为杂质自旋之间的媒介。海森堡算符用来描述电子和杂质自旋之间的相互作用。我们使用波导形式来模拟弹道电子波函数。纠缠控制被证明是可能的三种不同的协议的纠缠检测。讨论了探测协议对纠缠提取的影响。

英文摘要:

We show that the entanglement between two distant magnetic impurities, generated via electron scattering, can be easily modulated by controlling the magnitude of an applied external electric field. We assume that the two magnetic impurities are fixed and located on an one-dimensional quantum wire. A ballistic electron moving through the wire is scattered off by both impurities, so the electron spin can be seen as a mediator between the spins of the impurities. Heisenberg operators are used to describe the interactions between electron and impurities spins. We use a wave guide formalism to model the ballistic electron wave-function. Entanglement control is shown to be possible for three different protocols of entanglement detection. The effect of detection protocols on the entanglement extraction is discussed.

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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