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Related Experiment Video

Updated: Nov 20, 2025

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Optical properties of periodically driven open nonequilibrium quantum systems.

Gabriel Cabra¹, Ignacio Franco², Michael Galperin¹

¹Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, USA.

The Journal of Chemical Physics

|January 22, 2021

Summary

We present a theory for optical and transport properties of molecular junctions using Floquet theory and nonequilibrium Green's functions. This work advances understanding of periodically driven quantum systems for quantum technologies.

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Area of Science:

Quantum physics
Materials science
Nanotechnology

Background:

Optical control of matter is crucial for fundamental insights and technological applications.
Theoretical modeling of periodically driven systems is essential for developing nanoscale quantum devices.
Understanding open quantum systems under external driving is key to advancing quantum technologies.

Purpose of the Study:

To develop a theoretical framework for analyzing the transport and optical response of molecular junctions under periodic driving.
To investigate the influence of external periodic driving on the behavior of open nonequilibrium quantum systems.
To provide a foundation for engineering quantum devices utilizing light-matter interactions.

Main Methods:

Utilizing Floquet theory to describe periodic driving.
Employing nonequilibrium Green's function formalism for open quantum systems.
Applying the self-consistent Born approximation to model light-matter interactions.
Using a generic three-level model for illustration.

Main Results:

A theoretical model for transport and optical response in periodically driven molecular junctions has been developed.
The study illustrates how periodic driving affects the optical and transport properties of these systems.
The findings provide insights into controlling quantum phenomena in nanoscale devices.

Conclusions:

The developed theory offers a pathway to characterize and control matter using optical means in molecular junctions.
This research contributes to the fundamental understanding of periodically driven quantum systems.
The work has implications for the design and development of future quantum technologies.