Abstract
We theoretically investigate properties of the pairwise and bipartite entanglements of three non-equally separated quantum dots (QDs) coupled to one-dimensional plasmonic nanowaveguide by means of the concurrence as a measure of entanglement. High concurrences of pairwise and bipartite entangled states for three QDs are obtained in wide range of the separation distances between the QDs. Moreover, the switching of maximally entangled state and unentangled state can be achieved by properly modulating the frequency detuning of the QDs from the plasmon field and the separation distances between the QDs.
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