Quantum dynamics of coupled quasinormal modes and quantum emitters interacting via finite-delay propagating photons
Abstract
A time-dependent theory for the interactions between spatially separated lossy cavities in a homogeneous background medium using quantized quasinormal modes (QNMs) is presented. The cavities interact via a bath of traveling photons, described by non-bosonic operators that are orthogonal to the open-cavity QNMs. The retarded (i.e., time-delayed) inter-cavity dynamics are fully described by system-bath correlation functions, in which the emission from one cavity appears as the input field for another. Coupling between quantum emitters (described as two-level systems), placed inside a cavity or embedded in an external medium, and the electromagnetic field (cavity modes and bath photons) is included in the theory, which gives rise to both bath-mediated and QNM-mediated interactions between the emitters.
Keywords
Cite
@article{arxiv.2604.12605,
title = {Quantum dynamics of coupled quasinormal modes and quantum emitters interacting via finite-delay propagating photons},
author = {Robert Meiners Fuchs and Juanjuan Ren and Sebastian Franke and Stephen Hughes and Marten Richter},
journal= {arXiv preprint arXiv:2604.12605},
year = {2026}
}