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MON: Monday Contributed Sessions

MON 23: Poster Session: Fundamental Aspects and Model Systems

MON 23.41: Poster

Monday, September 8, 2025, 18:30–20:30, ZHG Foyer 1. OG

Coherent interactions of quantum emitters in a dielectric waveguide — •Grigory Kornilov, Alok Gokhale, Gregor Pieplow, Tim Schröder, Kurt Busch, and Francesco Intravaia — Humboldt-Universität zu Berlin, Berlin, Germany

Robust theoretical modeling of quantum emitters in dielectric media is crucial for predicting their behavior in practical applications. Existing models often simplify the system to a one-dimensional regime, thereby failing to accurately capture the influence of quantum noise and radiative losses on the emitters' intrinsic properties and overall system performance. Especially in nanoscopic devices, such as photonic integrated circuits with embedded solid-state quantum emitters, these effects can significantly impact measurement outcomes.

Utilizing a Green's-tensor approach in combination with the theory of open quantum systems, we present a fully three-dimensional quantum electrodynamics description of a quantum emitter embedded in a dielectric structure. Specifically, we investigate negatively charged nitrogen vacancy centers (NVs) in a cylindrical diamond waveguide. We explore the interaction of a single NV with an incident light field as well as waveguide-mediated coherent interactions between multiple emitters. In particular, the latter analysis may inform future experiments seeking to harness such collective effects. We also show how our explicit treatment of phonon-mediated NV decay affects simulated experiments beyond a simple modification of the NV-waveguide coupling strength.

Keywords: Photonic integrated circuits; Quantum electrodynamics; Quantum photonics; Nitrogen-vacancy centers; Collective effects