期刊
PHYSICAL REVIEW LETTERS
卷 112, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.112.216805
关键词
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资金
- European Research Council [290981]
- EU FP7 project PROMISCE
- CAM Research Consortium QUITEMAD [S2009-ESP-1594]
- Spanish MINECO projects [FIS2012-33022, MAT2011-28581-C02-01]
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.
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