Scattering model description of cascaded cavity configurations

TL;DR

This paper introduces a scattering model approach to describe cascaded optical cavities, providing insights into its validity compared to traditional coupled-mode Hamiltonian models in quantum information processing.

Contribution

It presents a novel scattering model method for cascaded cavities and assesses its accuracy against existing coupled-mode models.

Findings

Scattering model accurately describes cascaded cavities in certain regimes.

Validity regime of coupled-mode models is identified.

Provides a new framework for analyzing quantum optical systems.

Abstract

Cascaded optical cavities appear in various quantum information processing schemes in which atomic qubits are sitting in separate cavities interconnected by photons as flying qubits. The usual theoretical description relies on a coupled-mode Hamiltonian approach. Here we investigate the system of cascaded cavities without modal decomposition by using a scattering model approach and determine the validity regime of the coupled-mode models.