Toy models of crossed Andreev reflection

TL;DR

This paper introduces simplified models for crossed Andreev reflection in multiterminal hybrid structures with out-of-equilibrium conductors, analyzing two experimental setups involving quantum dots and Aharonov-Bohm loops.

Contribution

It presents novel toy models for understanding crossed Andreev reflection in complex multiterminal devices with out-of-equilibrium components.

Findings

Models capture essential physics of crossed Andreev reflection

Application to quantum dot and Aharonov-Bohm loop devices

Provides a basis for future experimental and theoretical studies

Abstract

We propose toy models of crossed Andreev reflection in multiterminal hybrid structures containing out-of-equilibrium conductors. We apply the description to two possible experiments: (i) to a device containing a large quantum dot inserted in a crossed Andreev reflection circuit. (ii) To a device containing an Aharonov-Bohm loop inserted in a crossed Andreev reflection circuit.