Toward Polaritonic Molecular Orbitals for Large Molecular Systems

Area of Science:

• Theoretical Chemistry
• Quantum Electrodynamics (QED)
• Computational Chemistry

Background:

• Electron-photon correlation is crucial for understanding molecular orbital changes in QED.
• Strong coupling QED Hartree-Fock (SC-QED-HF) theory provides molecular orbitals in strong coupling regimes.
• Previous SC-QED-HF implementations faced convergence issues, limiting their practical use.

Purpose of the Study:

• To develop improved algorithms for SC-QED-HF theory.
• To reduce computational demands for modeling large molecular systems in QED.
• To enable further development of correlated and multi-level methods.

Main Methods:

• Introduction of two novel second-order algorithms.
• Enhancement of the SC-QED-HF implementation.
• Focus on reducing computational requirements.

Main Results:

• Significantly reduced computational requirements for SC-QED-HF calculations.
• Enhanced ability to model large molecular systems in QED environments.
• Overcoming previous convergence limitations.

Conclusions:

• The new algorithms improve the efficiency and applicability of SC-QED-HF theory.
• This work lays the foundation for advanced correlated and multi-level methods.
• Enables accurate modeling of molecular behavior in complex QED systems, including solvent effects.