Two-particle non-local Aharonov-Bohm effect from two single-particle emitters

TL;DR

This paper introduces a mesoscopic quantum circuit with two single-particle sources and interferometers that generate orbitally entangled electrons, demonstrating a two-particle non-local Aharonov-Bohm effect through noise correlations.

Contribution

It presents a novel setup for controllably producing and detecting orbitally entangled electrons via two uncorrelated sources and distant interferometers in the quantum Hall regime.

Findings

Two-particle correlations cause an Aharonov-Bohm effect in noise.

Maximum entanglement and Bell inequality violation are achievable.

Current remains insensitive to magnetic fluxes.

Abstract

We propose a mesoscopic circuit in the quantum Hall effect regime comprising two uncorrelated single-particle sources and two distant Mach-Zehnder interferometers with magnetic fluxes, which allows in a controllable way to produce orbitally entangled electrons. Two-particle correlations appear as a consequence of erasing of which path information due to collisions taking place at distant interferometers and in general at different times. The two-particle correlations manifest themselves as an Aharonov-Bohm effect in noise while the current is insensitive to magnetic fluxes. In an appropriate time-interval the concurrence reaches a maximum and a Bell inequality is violated.