Superradiance Transition in Transport Through Nanosystems

TL;DR

This paper investigates how a superradiance transition affects electron transport in nanosystems, revealing a regime where transmission is maximized and resonance structures change dramatically, especially in disordered regimes.

Contribution

It introduces a non-Hermitian Hamiltonian approach to describe superradiance transition in nanoscale transport, linking resonance behavior with transport efficiency.

Findings

Superradiance transition causes a peak in transmission.

Resonance structures undergo significant changes at the transition.

Superradiance effects are analyzed within Anderson localized regimes.

Abstract

Using an energy-independent non-Hermitian Hamiltonian approach to open systems, we fully describe transport through a sequence of potential barriers as external barriers are varied. Analyzing the complex eigenvalues of the non-Hermitian Hamiltonian model, a transition to a superradiant regime is shown to occur. Transport properties undergo a strong change at the superradiance transition, where the transmission is maximized and a drastic change in the structure of resonances is demonstrated. Finally, we analyze the effect of the superradiance transition in the Anderson localized regime.