Controlled Quantum Operations of a Semiconductor Three-Qubit System

TL;DR

This paper demonstrates controlled quantum operations in a three-qubit semiconductor system, utilizing Coulomb interactions to achieve coherent control of charge qubits, advancing quantum computing capabilities.

Contribution

It introduces a method for controlling three electron charge qubits via Coulomb interactions in semiconductor double quantum dots, showing coherent control enabled by strong inter-qubit coupling.

Findings

Successful implementation of controlled quantum operations

Demonstration of coherent rotations controlled by two qubits

Evidence of strong Coulomb interactions enabling control

Abstract

The Coulomb interactions between electrons play important roles in coupling multiple qubits in various quantum systems. Here we demonstrate controlled quantum operations of three electron charge qubits based on three capacitively coupled semiconductor double quantum dots. The strong interactions between one double dot and other two double dots enable us to control the coherent rotations of one target qubit by the states of two control qubits.