On-demand entanglement generation using dynamic single-electron sources

TL;DR

This paper reviews methods for on-demand entanglement generation in electronic systems using dynamic single-electron sources, focusing on quantum point contacts and their potential for quantum information applications.

Contribution

It introduces new approaches for generating and certifying entanglement in dynamic electronic conductors, analyzing effects of temperature and dephasing.

Findings

Entanglement can be generated via quantum point contacts acting as beam splitters.

Finite temperature and dephasing reduce entanglement quality.

Proposals for experimental realization and future developments are discussed.

Abstract

We review our recent proposals for the on-demand generation of entangled few-electron states using dynamic single-electron sources. The generation of entanglement can be traced back to the single-electron entanglement produced by quantum point contacts acting as electronic beam splitters. The coherent partitioning of a single electron leads to entanglement between the two outgoing arms of the quantum point contact. We describe our various approaches for generating and certifying entanglement in dynamic electronic conductors and we quantify the influence of detrimental effects such as finite electronic temperatures and other dephasing mechanisms. The prospects for future experiments are discussed and possible avenues for further developments are identified.