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Related Experiment Video

Updated: Jun 21, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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Published on: May 30, 2014

Heat Pulses in Electron Quantum Optics.

Pedro Portugal¹, Fredrik Brange¹, Christian Flindt¹

¹Department of Applied Physics, <a href="https://ror.org/020hwjq30">Aalto University</a>, 00076 Aalto, Finland.

Physical Review Letters

|July 12, 2024

Summary

This summary is machine-generated.

Researchers explored heat pulses in conductors using Floquet scattering theory. This work confirms the fluctuation-dissipation theorem for heat currents and opens new avenues for quantum heat transport research.

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Area of Science:

Quantum physics
Mesoscopic conductors
Quantum optics

Background:

Electron quantum optics uses charge pulses in conductors, analogous to photons in light.
Heat pulses, generated by thermal gradients, offer an alternative excitation method.

Purpose of the Study:

To formulate a Floquet scattering theory for heat pulses in mesoscopic conductors.
To investigate the properties and potential applications of heat pulses.

Main Methods:

Formulation of Floquet scattering theory for heat pulses.
Analysis of heat current in linear response.
Evaluation of partition noise using a quantum point contact.
Utilizing a Hong-Ou-Mandel setup to study pulse correlations.
Employing a Mach-Zehnder interferometer for thermoelectric effects.

Main Results:

Adiabatic heat pulses generate a heat current equal to the thermal conductance quantum.
A high-frequency component ensures the fluctuation-dissipation theorem for heat currents is satisfied.
Heat pulses are uncharged, with their electron-hole content probed via partition noise.
Hong-Ou-Mandel experiments reveal pulse bunching or antibunching behavior.
A thermoelectric effect is demonstrated using a Mach-Zehnder interferometer.

Conclusions:

The study provides a theoretical framework for understanding heat pulses in mesoscopic systems.
Findings validate the fluctuation-dissipation theorem for heat currents.
The research opens possibilities for future experiments and applications in quantum heat transport and thermoelectricity.