Quantum dynamics of coupled quasinormal modes and quantum emitters interacting via finite-delay propagating photons

• URL: http://arxiv.org/abs/2604.12605v1
• Date: Tue, 14 Apr 2026 11:30:55 GMT
• Title: Quantum dynamics of coupled quasinormal modes and quantum emitters interacting via finite-delay propagating photons
• Abstract summary: A time-dependent theory for the interactions between spatially separated lossy cavities in a homogeneous background medium is presented.<n>The cavities interact via a bath of traveling photons, described by non-bosonic operators that are to the open-cavity QNMs.
• Score: 0.8512867189292055
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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