Two-Qubit Pulse Gate for the Three-Electron Double Quantum Dot Qubit

TL;DR

This paper proposes a pulse-gated two-qubit entangling gate for three-electron double quantum dot qubits, advancing the development of scalable quantum computing with silicon quantum dots.

Contribution

It introduces a novel pulse-gated two-qubit gate that completes the universal set of operations for this qubit platform.

Findings

High-fidelity entangling operations are achievable with existing pulse techniques.

The proposed gate enables scalable quantum computation with three-electron double quantum dots.

The requirements mirror those for successful single-qubit manipulations in silicon quantum dots.

Abstract

The three-electron configuration of gate-defined double quantum dots encodes a promising qubit for quantum information processing. I propose a two-qubit entangling gate using a pulse-gated manipulation procedure. The requirements for high-fidelity entangling operations are equivalent to the requirements for the pulse-gated single-qubit manipulations that have been successfully realized for Si QDs. This two-qubit gate completes the universal set of all-pulse-gated operations for the three-electron double-dot qubit and paves the way for a scalable setup to achieve quantum computation.