Fundamental Gates for a Strongly Correlated Two-Electron Quantum Ring

TL;DR

This paper shows that high-fidelity quantum gates can be implemented in a strongly interacting two-electron quantum ring using optimized electromagnetic pulses, enabling fast and reliable quantum operations.

Contribution

It introduces a quantum control algorithm to optimize pulses for universal quantum gates in a strongly correlated two-electron quantum ring.

Findings

Near 100% fidelity for quantum gates achieved

Operations occur faster than decoherence times

Applicable to strongly interacting electron systems

Abstract

We demonstrate that conditional as well as unconditional basic operations which are prerequisite for universal quantum gates can be performed with almost 100% fidelity within a strongly interacting two-electron quantum ring. Both sets of operations are based on a quantum control algorithm that optimizes a driving electromagnetic pulse for a given quantum gate. The demonstrated transitions occur on a time scale much shorter than typical decoherence times of the system.