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Updated: May 8, 2025
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Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
Published on: May 27, 2020
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Photon Many-Body Dispersion: Exchange-Correlation Functional for Strongly Coupled Light-Matter Systems.
Cankut Tasci1,2, Leonardo A Cunha3, Johannes Flick1,2,3
1City College of New York, Department of Physics, New York, New York 10031, USA.
Physical Review Letters
|March 7, 2025
Summary
We developed a new method, photon Many-Body Dispersion (pMBD), for quantum electrodynamical density-functional theory. This approach accurately models strong light-matter interactions and cavity effects efficiently.
Area of Science:
- Quantum electrodynamical density-functional theory (QEDFT)
- Computational physics
- Strong light-matter interactions
Background:
- Accurate modeling of electron-photon interactions is crucial for understanding quantum systems.
- Existing methods struggle with strong light-matter coupling and cavity effects.
Purpose of the Study:
- Introduce a novel electron-photon exchange-correlation functional for QEDFT.
- Develop a method that efficiently captures complex light-matter interactions.
Main Methods:
- Generalized the many-body dispersion (MBD) method to include electronic and photonic degrees of freedom.
- Developed the photon MBD (pMBD) approach for QEDFT.
Main Results:
- pMBD accurately describes anisotropic electron-photon interactions and beyond single-photon effects.
- The method captures cavity-modulated van der Waals interactions.
- pMBD demonstrates computational efficiency for large systems.
Conclusions:
- pMBD offers a computationally efficient and accurate method for QEDFT.
- Enables simulations of large complex systems interacting with optical cavities.
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