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Trapped Ion Quantum Computing

Selective generation and amplification of RKKY interactions by P-N interface

arXiv
Authors: Shu-Hui Zhang, Jia-Ji Zhu, Wen Yang, Kai Chang

Year

2018

Paper ID

22881

Status

Preprint

Abstract Read

~2 min

Abstract Words

111

Citations

N/A

Abstract

We propose a physical mechanism to generate and selectively amplify anisotropic Rudermann-Kittel-Kasuya-Yosida (RKKY) interactions between two local spins. The idea is to combine the deflection of the carrier velocity by a P-N interface and the locking of this velocity to the carrier spin orientation via spin-orbit coupling. We provide analytical and numerical results to demonstrate this mechanism on the surface of a topological insulator P-N junction. This work identifies the P-N interface as a second knob which, together with the carrier density, enables independent control of the strength and anisotropy of the RKKY interaction over a wide range. These findings may be relevant to scalable quantum computation and two-impurity quantum criticality.

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  • This paper contributes to the Trapped-Ion Quantum Computing research area in the Quantum Articles archive.
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  • We propose a physical mechanism to generate and selectively amplify anisotropic Rudermann-Kittel-Kasuya-Yosida (RKKY) interactions between two local spins.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1812.02281 [2] arXiv https://arxiv.org/abs/1812.02281 [3] Publisher https://arxiv.org/abs/1812.02281

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