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arXiv 1209.0992cond-mat.mes-hall
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耦合量子点中自旋纠缠两粒子暗态的量子输运

Spin entangled two-particle dark state in quantum transport through coupled quantum dots

Christina Pöltl, Clive Emary, Tobias Brandes

摘要:

我们提出了一个耦合量子点的传输设置,使空间分离的自旋纠缠双电子暗态的创建。通过研究不与电子库耦合的系统哈密顿量,证明了纠缠输运暗态的存在。在输运机制中,对应于单重态的纠缠暗态与对应于三重态的混合物的暗态相比具有强烈增强的Fano因子。此外,我们还计算了占据电子的纠缠度,以显示在输运状态下的纠缠程度。

英文摘要:

We present a transport setup of coupled quantum dots that enables the creation of spatially separated spin-entangled two-electron dark states. We prove the existence of an entangled transport dark state by investigating the system Hamiltonian without coupling to the electronic reservoirs. In the transport regime the entangled dark state which corresponds to a singlet has a strongly enhanced Fano factor compared to the dark state which corresponds to a mixture of the triplet states. Furthermore we calculate the concurrence of the occupying electrons to show the degree of entanglement in the transport regime.

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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