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

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

2011-07-04

arxiv.org/abs/1107.0584v2

Physics

Condensed Matter

Materials Science

6 pages. Conference Proceedings PLMCN11

Scientific paper

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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