Quantum steering of electron wave function in an InAs Y-branch switch

TL;DR

This paper demonstrates that gating in InAs Y-branch switches can steer electron wave functions, altering interference patterns and transconductance, revealing wave function control in multi-channel transistors.

Contribution

It provides experimental evidence of electron wave function steering in a multi-channel transistor structure using gating in InAs Y-branch switches.

Findings

Gating modifies electron wave functions and interference patterns.

Observation of anti-correlated, oscillatory transconductances.

Evidence of wave function steering in a multi-channel device.

Abstract

We report experiments on gated Y-branch switches made from InAs ballistic electron wave guides. We demonstrate that gating modifies the electron wave functions as well as their interference pattern, causing the anti-correlated, oscillatory transconductances. Such previously unexpected phenomenon provides evidence of steering the electron wave function in a multi-channel transistor structure.