2014/02/28 by Javier del Pino, Johannes Feist, F. J. García-Vidal +3 · 1 citation
Computer Science · Engineering · Materials Science · Physics and Astronomy · #Coupling (piping) #Dissipation #Field (mathematics) #Gold and Silver Nanoparticles Synthesis and Applications #Materials science #Particle (ecology) #Physics #Plasmon #Plasmonic and Surface Plasmon Research #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum mechanics #Quasiparticle #Superconductivity #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1103/physrevlett.112.216805
published as Phys. Rev. Lett. 112, 216805 (2014) · 8 pages (6 main text + 2 supplemental), 3 figures
arxiv created 2014/02/28 · openalex publication_date 2014/05/29 · arxiv updated 2014/09/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
When in close contact, plasmonic resonances interact and become strongly correlated. In this work we develop a quantum mechanical model for an array of coupled particle plasmons. This model predicts that when the coupling strength between plasmons approaches or surpasses the local dissipation, a sizable amount of entanglement is stored in the collective modes of the array. We also prove that entanglement manifests itself in far-field images of the plasmonic modes, through the statistics of the quadratures of the field, in what constitutes a novel family of entanglement witnesses. Finally, we estimate the amount of entanglement, the coupling strength and the correlation properties for a system that consists of two or more coupled nanospheres of silver, showing evidence that our predictions could be tested using present-day state-of-the-art technology.