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Bridging quantum noise and classical electrodynamics with stochastic methods
Felix Hitzelhammer1, Johannes Stowasser2, Lukas Hanschke2,3
1Institute of Physics, NAWI Graz, University of Graz, Graz, Austria. felix.hitzelhammer@uni-graz.at.
Nature Communications
|May 19, 2026
Summary
We developed a new computational framework using coupled stochastic processes to accurately model quantum optics phenomena. This method captures quantum effects in complex photonic systems, validated by experimental data.
Area of Science:
- Quantum optics
- Computational physics
- Nanophotonics
Background:
- Accurate modeling of quantum optics is crucial for emerging technologies.
- Existing semiclassical and full quantum treatments have limitations in computational cost and accuracy for quantized fields.
- Bridging classical electromagnetics and quantum phenomena requires advanced simulation techniques.
Purpose of the Study:
- To develop a novel computational framework for simulating quantum optical systems.
- To address the limitations of current semiclassical and full quantum approaches.
- To create a method compatible with classical electromagnetics while capturing quantum effects.
Main Methods:
- Developed a framework based on coupled stochastic processes with a common cross-covariance structure.
- Coupled the framework with various Maxwell solvers.
- Accounted for non-commutativity in the quantum-to-classical transition.
Main Results:
- The framework successfully captures quantum optical signatures.
- Demonstrated compatibility with classical electromagnetics.
- Achieved excellent agreement between simulation results and experimental emission spectra of a quantum dot.
Conclusions:
- Tailored stochastic processes offer a powerful tool for simulating non-classical light.
- The developed framework is suitable for complex photonic environments.
- This approach provides a viable solution for modeling quantum optics phenomena.
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