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arXiv:1107.0584 · Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics

Exploring qubit‐qubit entanglement mediated by one‐dimensional plasmonic nanowaveguides

Alejandro González-Tudela, Diego Martín-Cano, Esteban Moreno, Luis Martín-Moreno, Francisco José García-Vidal, C. Tejedor

Published Apr 12, 2012• 6 citations
arXivHTMLPDF

Abstract

Abstract We exploit the qubit‐qubit coupling induced by plasmon‐polariton modes in a one‐dimensional nanowaveguide to obtain various two‐qubit entanglement situations. Firstly, we observe three phenomena occurring when preparing the initial state of the system and leaving it freely relax: spontaneous formation of entanglement, sudden birth and revival. Then, we show that plugging a laser to each of the qubit, the system arrives to an steady state which, depending on their inter‐qubit distance, can also be entangled. For this situation, we also characterize the quantum state of the system showing the entanglement‐purity‐diagram typical for two‐qubit systems. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

DOI
10.1002/pssc.201100197

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