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Related Experiment Video

Updated: Nov 2, 2025

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

Published on: April 16, 2017

Harmonic chains and the thermal diode effect.

Na'im Kalantar¹, Bijay Kumar Agarwalla², Dvira Segal³

¹Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario, Canada M5S 3H6.

Physical Review. E

|June 17, 2021

Summary

This summary is machine-generated.

Perfectly harmonic systems can rectify heat flow, acting as diodes, when subjected to asymmetric temperature gradients. This "temperature-gradient harmonic oscillator diode" effect is demonstrated in both quantum and classical transport regimes.

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Last Updated: Nov 2, 2025

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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

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Published on: April 24, 2014

Area of Science:

Condensed matter physics
Statistical mechanics
Nonlinear dynamics

Background:

Harmonic oscillator chains coupled to thermal reservoirs typically do not function as thermal diodes.
Structural asymmetry alone is insufficient to induce thermal rectification in such systems.

Purpose of the Study:

To investigate the possibility of thermal rectification in perfectly harmonic systems.
To identify conditions under which harmonic junctions can exhibit diode-like behavior for heat transport.

Main Methods:

Analytical formulation of steady-state heat transport in harmonic systems.
Coupling harmonic systems to Langevin baths representing thermal reservoirs.
Investigating systems under asymmetric temperature gradients.

Main Results:

Harmonic junctions rectify heat flow when reservoirs are subjected to asymmetric temperature gradients, a phenomenon termed "temperature-gradient harmonic oscillator diodes."
This nonlinear diode effect arises from the imposed thermal gradient boundary conditions.
Rectification is observed in both quantum and classical transport regimes.

Conclusions:

Perfectly harmonic systems can function as thermal diodes under specific boundary conditions (asymmetric temperature gradients).
The study demonstrates a novel mechanism for thermal rectification in harmonic systems.
Potential applications include asymmetric harmonic systems like hydrocarbon molecules and trapped ion lattices.