Production of multipartite entanglement for electron spins in quantum dots

TL;DR

This paper presents a method to generate multipartite entanglement in electron spin qubits within quantum dots, utilizing natural interactions and rotations, with potential for experimental realization and scalable entangled state production.

Contribution

It introduces a scalable scheme for creating genuine multipartite entanglement in quantum dot electron spins using existing operations, with linear resource scaling.

Findings

Minimum operations scale linearly with qubit number

Fidelities of generated states are estimated

Scheme is feasible with current technology

Abstract

We propose how to generate genuine multipartite entanglement of electron spin qubits in a chain of quantum dots using the naturally available single-qubit rotations and two-qubit Heisenberg exchange interaction in the system. We show that the minimum number of required operations to generate entangled states of the GHZ-, cluster and W-type scales linearly with the number of qubits and estimate the fidelities of the generated entangled cluster states. As the required single and two-qubit operations have recently been realized, our proposed scheme opens the way for experimental investigation of multipartite entanglement with electron spin qubits.