Biswajit Karmakar, Davide Venturelli
We introduce and experimentally demonstrate a new method that allows us to controllably couple co-propagating spin-resolved edge states of a two dimensional electron gas (2DEG) in the integer quantum Hall regime. The scheme exploits a spatially-periodic in-plane magnetic field created by an array of cobalt nano-magnets placed at the boundary of the 2DEG. A maximum charge/spin transfer of 28 ± 1% is achieved at 250 mK. This advancement addresses a critical challenge in implementing coherent electronics circuitry and quantum-computation architectures by enabling the precise control of charge transfer between co-propagating edge states, thus facilitating the realization of one-qubit gate transformations in proposed devices. The findings indicate that these spin-resolved edge states, characterized by their large relaxation and coherence lengths, can be manipulated through artificial magnetic fields, providing a pathway to potential applications in quantum information technologies.
@article{036eccc8-10de-4191-b8e9-b69d715ccc9f,
title={Controlled coupling of spin-resolved quantum Hall edge states},
author={Biswajit Karmakar and Davide Venturelli},
year={2008},
language={en}
}TY - JOUR TI - Controlled coupling of spin-resolved quantum Hall edge states AU - Biswajit Karmakar AU - Davide Venturelli PY - 2008 LA - en ER -
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