Dynamic Localization in Quantum Wires

TL;DR

This paper investigates how non-uniform, time-dependent electric fields can induce dynamic localization of electrons in quantum wires, creating effective potential wells that confine electrons similarly to classical Paul traps.

Contribution

It introduces a novel mechanism for electron confinement in quantum wires via dynamic localization caused by specific electric field configurations.

Findings

Electrons are trapped in deep dynamic quantum wells due to non-uniform electric fields.

The effect mimics a time-independent potential, enabling electron confinement.

Potential implications for quantum control and trapping techniques.

Abstract

In the paper the dynamic localization of charged particle (electron) in a quantum wire under the external non-uniform time-dependent electric field is considered. The electrons are trapped in a deep 'dynamic' quantum wells which are the result of specific features of the potential imposed on 2D electron gas: the scale of spatial nonuniformity is much smaller then the electron mean free path (L_1 << \bar{l}) and the frequency is much greater then \tau^{-1}, where \tau is the electron free flight time. As a result, the effect of this field on the charged particle is in a sense equivalent to the effect of a time-independent effective potential, that is a sequence of deep 'dynamic' quantum wells were the elelctrons are confined. The possible consequeces of this effect are also discussed and similarity with the classical Paul traps are emphasized.