Theoretical Framework for Single-Plasmon Transport in One-Dimensional Nanowires
Researchers have introduced a unified theoretical framework for modeling single-plasmon transport in one-dimensional nanowires, combining quantized electromagnetic Green's tensor formalism with non-Hermitian Hamiltonian models. The work analyzes how quantum emitters coupled to silver nanowires can control plasmon transmission, predicting as low as 7% transmittivity for a single emitter and 2% for an optimized five-emitter system. These findings lay groundwork for designing plasmonic waveguide quantum electrodynamics devices, including single-plasmon transistors.
A new theoretical study submitted to arXiv presents a comprehensive framework for describing single-plasmon transport along one-dimensional nanowires, unifying the quantized electromagnetic Green's tensor approach with effective non-Hermitian Hamiltonian models. The framework accounts for propagating surface plasmon polaritons, higher-order dissipative modes, and intrinsic material losses, enabling analysis of both steady-state and spatio-temporal pulse dynamics. Applied to a quantum emitter coupled to a silver nanowire — a configuration proposed as a single-plasmon transistor — the model predicts a plasmon transmittivity as low as 7% and an atomic qubit population of 12% under realistic telecom-wavelength conditions. Extending the framework to multi-emitter systems via a Löwdin orthogonalization procedure, the authors show that optimally positioning five emitters reduces transmittivity further to 2% while simultaneously cutting coupling losses to one-third of the single-emitter value. These results suggest that multi-emitter configurations offer a meaningful performance advantage for plasmonic quantum devices. The work is positioned as a robust theoretical foundation for the analysis and design of plasmonic waveguide quantum electrodynamics systems.
What's missing
As a preprint, this work has not yet undergone peer review, so the validity of the theoretical predictions and the assumptions underlying the model remain to be independently verified. The study does not report experimental validation of the predicted transmittivity values.
What different sources said
- arXiv physicsCenter
Single plasmon transport in one dimensional nanowire
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