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arXiv · 1107.0584

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

A. Gonzalez-Tudela·D. Martin-Cano·E. Moreno·L. Martin-Moreno·F. J. Garcia-Vidal·C. Tejedor
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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.

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A. Gonzalez-Tudela, D. Martin-Cano, E. Moreno, L. Martin-Moreno, F. J. Garcia-Vidal, C. Tejedor. 2011-07-04. Exploring qubit-qubit entanglement mediated by one-dimensional plasmonic nanowaveguides. https://arxiv.org/abs/1107.0584

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