Transient and steady-state Entanglement mediated by three-dimensional plasmonic waveguides

S. Ali Hassani Gangaraj, Andrei Nemilentsau, George W. Hanson, Stephen Hughes

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


Entanglement between two qubits (two level atoms) mediated by surface plasmons in three-dimensional plasmonic waveguides is studied using a quantum master equation formalism. Two types of waveguides, a nanowire and a V-shaped channel cut in a flat metal plane, are considered. The Green functions for the waveguides, which rigorously describes the dissipative qubit environment, are calculated numerically using a direct finite-difference time-domain (FDTD) solution of Maxwell's equations. Finite-length effects are shown to play a crucial role in enhancing entanglement, and resonant-length plasmonic waveguides can provide higher entanglement between qubits than infinite-length waveguides. It is also shown that coupling slots can improve entanglement via stronger qubitwaveguide coupling, for both the infinite- and finite-waveguide cases. The formalism used in the paper can be applied to a wide range of plasmonic waveguides.

Original languageEnglish (US)
Pages (from-to)22330-22346
Number of pages17
JournalOptics Express
Issue number17
StatePublished - Aug 24 2015

Bibliographical note

Funding Information:
This work was supported by the Natural Sciences and Engineering Research Council of Canada and Queen''s University.

Publisher Copyright:
© 2015 Optical Society of America.


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