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Updated: May 27, 2026

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Published on: November 2, 2013

Time-dependent quantum transport behavior through T-shaped double quantum dots.

Hui Pan¹, Yinghui Zhao

¹Department of Physics, Beijing University of Aeronautics and Astronautics, Beijing 100083, People's Republic of China.

Journal of Physics. Condensed Matter : an Institute of Physics Journal

|August 11, 2011

Summary

This summary is machine-generated.

Transient current in T-shaped double quantum dots exhibits quantum ringing and beats. These phenomena depend on pulse bias and interdot coupling, offering tunable control over quantum electronic behavior.

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Area of Science:

Quantum physics
Condensed matter theory
Nanoscale electronics

Background:

Understanding electron transport in quantum dot systems is crucial for developing advanced electronic devices.
Time-dependent phenomena in quantum dots provide insights into quantum coherence and electron dynamics.

Purpose of the Study:

To theoretically investigate the time-dependent current in a T-shaped double quantum dot system.
To analyze the emergence and tunability of quantum coherent phenomena like ringing and beats.

Main Methods:

Utilizing nonequilibrium Green's function methods for theoretical analysis.
Simulating transient current responses to applied bias voltage pulses.

Main Results:

Quantum coherent ringing and beats are observed in the transient current.
Ringing frequency is tunable by pulse bias in weak coupling; beats appear and are tunable by interdot coupling in strong coupling.
Quantum beats are suppressed by large energy differences between dots and diminish with increasing temperature.

Conclusions:

The study reveals distinct behaviors of quantum ringing and beats based on interdot coupling strength.
Tunability of these quantum phenomena offers potential for controlling electron transport in quantum dot devices.