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Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity

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Published on: March 6, 2017

Energy flow in periodic thermodynamics.

Matthias Langemeyer¹, Martin Holthaus¹

¹Institut für Physik, Carl von Ossietzky Universität, D-26111 Oldenburg, Germany.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|March 4, 2014

Summary

This study introduces a method to calculate energy dissipation in quantum systems. It highlights the significant role of pseudotransitions in energy flow and suggests quantum heating/cooling strategies.

Area of Science:

Quantum mechanics
Thermodynamics
Condensed matter physics

Background:

Characterizing energy dissipation in periodically driven quantum systems coupled to heat baths is crucial.
Understanding steady-state energy flow is essential for quantum thermodynamics.

Purpose of the Study:

To derive a general expression for computing the energy dissipation rate.
To analyze the contribution of different transition types to dissipation.
To explore potential quantum heating and cooling schemes.

Main Methods:

Derivation of a general expression for energy dissipation rate.
Analysis of heat baths composed of harmonic oscillators.
Examination of two analytically solvable model systems.

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Distinguishing between genuine and pseudotransitions.

Main Results:

A general formula for energy dissipation rate in quantum systems is derived.
Pseudotransitions significantly contribute to the total energy dissipation.
The study identifies potential quantum heating and cooling mechanisms.
Driven quantum systems may occupy multiple Floquet states even at zero temperature.

Conclusions:

The derived expression provides a tool for quantifying energy dissipation.
Understanding transition types is key to controlling energy flow.
The findings open avenues for quantum thermal management and control.