Electron teleportation with quantum dot arrays

TL;DR

This paper proposes a novel electron teleportation protocol using quantum dot arrays and superconducting circuits, enabling spin teleportation detection through correlated charge and current measurements.

Contribution

It introduces a new mesoscopic setup for electron teleportation inspired by Bennett's protocol, utilizing superconducting and quantum dot components for controlled entanglement and measurement.

Findings

Successful detection of spin teleportation via current correlation

Implementation of a classical communication channel through charge detection

Feasibility of electron teleportation in mesoscopic quantum dot systems

Abstract

An electron teleportation protocol, inspired by the scenario by Bennett et al., is proposed in a mesoscopic set-up. A superconducting circuit allows to both inject and measure entangled singlet electron pairs in an array of three normal quantum dots. The selection of the teleportation process is achieved in the steady state with the help of two superconducting dots and appropriate gating. Teleportation of the electron spin is detected by measuring the spin-polarized current through the normal dot array. This current is perfectly correlated to the pair current flowing inside the superconducting circuit. The classical channel required by Bennett's protocol, which signals the completion of a teleportation cycle, is identified with the detection of an electron charge in the superconducting circuit.