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Area of Science:

  • Quantum Chemistry
  • Physical Chemistry
  • Spectroscopy

Background:

  • Molecular polaritons form from strong light-matter interactions, hybridizing molecules and light.
  • This hybridization alters molecular properties and allows for external field-free control of chemical reactions.

Purpose of the Study:

  • Investigate the impact of strong light-matter coupling on molecular electronic structure.
  • Demonstrate the efficacy of perturbation theory for calculating polaritonic ground state energies.
  • Explore cavity-induced intermolecular forces.

Main Methods:

  • Utilized perturbative approaches, specifically Rayleigh-Schrödinger perturbation theory.
  • Employed response functions for implementation.
  • Compared results with ab initio cavity quantum electrodynamics methodologies.

Main Results:

  • Rayleigh-Schrödinger perturbation theory accurately reproduces ground state energies in optical cavities.
  • The method is effective across low and high cavity frequency regimes.
  • Established relations between cavity-induced intermolecular forces and van der Waals forces.

Conclusions:

  • Perturbation theory offers an accurate and straightforward method for studying molecular polaritons.
  • Findings provide insights into manipulating ground-state polaritonic energy landscapes.
  • Identified conditions for achieving modifications in molecular systems via light-matter coupling.