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Cavity QED beyond the Jaynes-Cummings model.

Abeer Al Ghamdi1,2, Gin Jose3, Almut Beige2

  • 1Physics and Astronomy Department, King Saud University, Riyadh, 11362 Saudi Arabia.

Optical and Quantum Electronics
|May 15, 2026
PubMed
Summary
This summary is machine-generated.

This study presents a dynamical model for atom-cavity systems, revealing that emitter decay rates can exceed free space values due to light interference. This finding may explain challenges in achieving strong coupling in experiments.

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Area of Science:

  • Quantum optics
  • Cavity quantum electrodynamics
  • Atomic physics

Background:

  • The Jaynes-Cummings model, while foundational, shows limitations with sophisticated atom-cavity systems.
  • Existing models often simplify the electromagnetic field within resonators to a single mode.

Purpose of the Study:

  • To develop a more dynamic model for atom-cavity systems that accounts for multi-mode electromagnetic fields.
  • To investigate the decay rates of emitters within subwavelength cavities with metallic mirrors.

Main Methods:

  • A dynamical approach to modeling atom-cavity systems, avoiding single-mode reduction of the electromagnetic field.
  • Analysis of emitter decay rates within a subwavelength cavity featuring metallic mirrors.

Main Results:

  • The decay rate ([Formula: see text]) of an emitter can significantly exceed its free space decay rate ([Formula: see text]) due to constructive interference of emitted light.
  • In general, the decay rate approximates [Formula: see text] with high accuracy.

Conclusions:

  • The dynamical model provides a more comprehensive understanding of atom-cavity interactions.
  • The findings may elucidate why experiments using planar mirrors struggle to reach the strong coupling regime.