Two-Impurity Kondo Model: Spin-Orbit Interactions and Entanglement
Abstract
Motivated by proposals to employ RKKY-coupled spins as building blocks in a solid-state quantum computer, we analyze how the RKKY interaction in a 2D electron gas is influenced by spin-orbit interactions. Using a two-impurity Kondo model with added Dresselhaus and Rashba spin-orbit interactions we find that spin-rotational invariance of the RKKY interaction - essential for having a well-controllable two-qubit gate - is restored when tuning the Rashba coupling to have the same strength as the Dresselhaus coupling. We also discuss the critical properties of the two-impurity Kondo model in the presence of spin-orbit interactions, and extract the leading correction to the block entanglement scaling due to these interactions.
Cite
@article{arxiv.1108.1817,
title = {Two-Impurity Kondo Model: Spin-Orbit Interactions and Entanglement},
author = {Henrik Johannesson and David F. Mross and Erik Eriksson},
journal= {arXiv preprint arXiv:1108.1817},
year = {2011}
}
Comments
Proceedings of StatPhys 24 satellite conference in Hanoi; 9 pages, 4 figures