Steady-State Coherent Transfer by Adiabatic Passage

TL;DR

This paper introduces a method for steady-state electron transfer in triple quantum dots using adiabatic passage, enabling direct transfer without middle dot occupation and reducing shot noise, which could provide experimental evidence for non-occupation.

Contribution

It presents a novel steady-state transfer protocol based on CTAP in quantum dots, demonstrating suppressed shot noise and potential for experimental validation of non-occupation.

Findings

Steady-state current achieved with suppressed shot noise.

Direct electron transfer between outer dots without middle dot occupation.

Potential for experimental verification of non-occupation in quantum dots.

Abstract

We propose steady-state electron transport based on coherent transfer by adiabatic passage (CTAP) in a linearly arranged triple quantum dot with leads attached to the outer dots. Its main feature is repeated steering of single electrons from the first dot to the last dot without relevant occupation of the middle dot. The coupling to leads enables a steady-state current, whose shot noise is significantly suppressed provided that the CTAP protocol performs properly. This represents an indication for the direct transfer between spatially separated dots and, thus, may resolve the problem of finding experimental evidence for the non-occupation of the middle dot.