Quantum entanglement generation with surface acoustic waves

TL;DR

This paper proposes a method to generate spin entanglement between two electrons in a semiconductor wire using surface acoustic waves, with detailed numerical analysis showing conditions for full entanglement.

Contribution

It introduces a novel scheme combining quantum wells and surface acoustic waves to produce and control electron spin entanglement in semiconductor nanostructures.

Findings

Electrons can be fully spin entangled under specific confinement conditions.

Coulomb interaction induces entanglement depending on potential parameters.

Numerical simulations identify optimal parameters for entanglement generation.

Abstract

We propose a scheme to produce spin entangled states for two interacting electrons. One electron is bound in a well in a semiconductor quantum wire and the second electron is transported along the wire, trapped in a surface acoustic wave potential (SAW) minimum. We investigate the conditions for which the Coulomb interaction between the two electrons induces entanglement. Detailed numerical investigation reveals that the two electrons can be fully spin entangled depending on the confinement characteristics of the well and the SAW potential amplitude.