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Entanglement detection in coupled particle plasmons

AuthorsPino, Javier del; Feist, Johannes; García-Vidal, Francisco J.; García-Ripoll, Juan José
Issue Date29-May-2014
PublisherAmerican Physical Society
CitationPhysical Review Letters 112: 216805 (2014)
AbstractWhen 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. © 2014 American Physical Society.
Description5 pags.; 3 figs. PACS numbers: 73.20.Mf, 03.67.Mn, 42.50.Dv
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.112.216805
Identifiersdoi: 10.1103/PhysRevLett.112.216805
issn: 1079-7114
Appears in Collections:(CFMAC-IFF) Artículos
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