Pseudospin entanglement and Bell test in graphene

TL;DR

This paper proposes a method to generate and detect pseudospin entanglement in graphene electrons and holes, using fluctuating potentials and current correlations, enabling a Bell test based on electron chirality.

Contribution

It introduces a novel approach to produce and measure pseudospin entanglement in graphene, leveraging electron-hole pairs and real-space spin projections.

Findings

Pseudospin entanglement can be generated in graphene.

Current correlation measurements can demonstrate entanglement.

A Bell test is feasible using electron chirality in graphene.

Abstract

We propose a way of producing and detecting pseudospin entanglement between electrons and holes in graphene. Electron-hole pairs are produced by a fluctuating potential and their entanglement is demonstrated by a current correlation measurement. The chirality of electrons in graphene facilitates a well-controlled Bell test with (pseudo-)spin projection angles defined in real space.