Localized charge bifurcation in the coupled quantum dots

TL;DR

This paper presents a theoretical analysis of charge relaxation in coupled quantum dots, revealing two stable regimes with different relaxation rates and a rapid switching phenomenon, with potential applications in nano-electronic devices.

Contribution

The study uncovers a novel charge bifurcation behavior in coupled quantum dots, highlighting the existence of two stable relaxation regimes and a rapid switching mechanism.

Findings

Charge relaxation occurs through two stable regimes.

A rapid switching point exists between regimes.

Potential for nano-electronic device applications.

Abstract

We analyzed theoretically localized charge relaxation in a double quantum dot (QD) system coupled with continuous spectrum states in the presence of localized electrons Coulomb interaction in a single QD. We have found that for a wide range of system parameters charge relaxation occurs through two stable regimes with significantly different relaxation rates. A peculiar time moment exists in the system at which rapid switching between stable regimes takes place. We consider this phenomenon to be applicable for creation of active elements in nano-electronics based on the fast transition effect between two stable states.