Sub-radiant states for imperfect quantum emitters coupled by a nanophotonic waveguide

Abstract

Coherent interactions between quantum emitters in tailored photonic structures is a fundamental building block for future quantum technologies, but remains challenging to observe in complex solid-state environments, where the role of decoherence must be considered. Here, we investigate the optical interaction between two quantum emitters mediated by one-dimensional waveguides in a realistic solid-state environment, focusing on the creation, population and detection of a sub-radiant state, in the presence of dephasing. We show that as dephasing increases, the signatures of sub-radiance quickly vanish in intensity measurements yet remain pronounced in photon correlation measurements, particularly when the two emitters are pumped separately so as to populate the sub-radiant state efficiently. The applied Green's tensor approach is used to model a photonic crystal waveguide, including the dependence on the spatial position of the integrated emitter. The work lays out a route to the experimental realization of sub-radiant states in nanophotonic waveguides containing solid-state emitters.

12 pages, 7 figures

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Cited by in corpus (8)

• Collective super- and subradiant dynamics between distant optical quantum emitters
• Control of Localized Multiple Excitation Dark States in Waveguide QED
• Independent electrical control of two quantum dots coupled through a photonic-crystal waveguide
• Dispersionless subradiant photon storage in one-dimensional emitter chains
• Topologically protected subradiant cavity polaritons through linewidth narrowing enabled by dissipationless edge states
• The role of polaron dressing in superradiant emission dynamics
• Controlling coherence between waveguide-coupled quantum dots
• Selective Preparation of Collective States in Coupled Quantum Emitters Using the SUPER Excitation Scheme