Dynamical behaviour of coupled atom-cavity systems in the single excitation limit

TL;DR

This paper studies the dynamics of photon detection in a fiber-coupled cavity-QED system with two atoms, revealing how normal-mode and non-Hermitian Hamiltonian approaches explain emission spectra features.

Contribution

It provides a detailed analysis of the system's evolution using both normal-mode and non-Hermitian Hamiltonian methods, highlighting subtle spectral features.

Findings

Normal-mode picture captures main dynamics

Non-Hermitian Hamiltonian explains small spectral features

Photon detection probabilities vary with system parameters

Abstract

We investigate the time evolution of the photon-detection probability at various output ports of an all-fiber coupled cavity-quantum-electrodynamics (cavity-QED) system. The setup consists of two atoms trapped separately in the field of two nanofiber cavities that are connected by a standard optical fiber. We find that the normal-mode picture captures well the main features of the dynamics. However, a more accurate description based on the diagonalization of a non-Hermitian Hamiltonian reveals the origin of small yet significant features in the spontaneous emission spectra.