Manipulation of a single magnetic atom using polarized single electron transport in a double quantum dot

TL;DR

This paper proposes a theoretical scheme for manipulating a single magnetic atom's spin using polarized electron transport in a double quantum dot, enabling electrical control crucial for quantum information processing.

Contribution

It introduces a novel method for single magnetic atom manipulation via polarized electron tunneling in a double quantum dot system, highlighting potential for scalable quantum logic gates.

Findings

Single electrons can carry information about magnetic impurity spin changes.

Spin blockade and conservation enable interaction between electrons and magnetic impurity.

The scheme suggests all-electrical manipulation of magnetic atoms for quantum computing.

Abstract

We consider theoretically a magnetic impurity spin driven by polarized electrons tunneling through a double quantum dot system. Spin blockade effect and spin conservation in the system make the magnetic impurity sufficiently interact with each transferring electron. As a results, a single collected electron carries information about spin change of the magnetic impurity. The scheme may develop all electrical manipulation of magnetic atoms by means of single electrons, which is significant for the implementation of scalable logical gates in information processing systems.