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Related Experiment Video

Updated: Jun 19, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Asymptotic nonequilibrium steady-state operators.

M F Gelin¹, D S Kosov

¹Department of Chemistry, Technical University of Munich, Lichtenbergstrasse 4, D-85747 Garching, Germany.

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

|October 2, 2009

Summary

This summary is machine-generated.

We developed a new method to calculate asymptotic operators for quantum systems out of equilibrium. This approach averages operators over infinite time, offering a novel way to study nonequilibrium steady states.

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Area of Science:

Quantum mechanics
Statistical physics

Background:

Studying the behavior of quantum systems far from thermal equilibrium is crucial for understanding various physical phenomena.
Existing methods for analyzing nonequilibrium steady states can be computationally intensive or limited in scope.

Purpose of the Study:

To introduce a novel method for calculating asymptotic operators in quantum systems that are not in thermal equilibrium.
To provide a computationally tractable approach for characterizing nonequilibrium steady states.

Main Methods:

The proposed method involves averaging operators in the Heisenberg representation over an infinite time duration.
This averaging procedure yields the asymptotic steady-state operator.

Main Results:

The method successfully calculates asymptotic operators for nonequilibrium steady-state quantum systems.
Demonstrated the utility of the method through several example calculations.
Results were validated by comparison with established Schwinger-Keldysh nonequilibrium Green's function techniques.

Conclusions:

The developed method offers an effective way to determine asymptotic operators for quantum systems out of equilibrium.
This approach provides a valuable tool for the theoretical investigation of nonequilibrium steady states in quantum physics.