Entanglement of two qubits mediated by one-dimensional plasmonic waveguides

Phys Rev Lett. 2011 Jan 14;106(2):020501. doi: 10.1103/PhysRevLett.106.020501. Epub 2011 Jan 10.


We investigate qubit-qubit entanglement mediated by plasmons supported by one-dimensional waveguides. We explore both the situation of spontaneous formation of entanglement from an unentangled state and the emergence of driven steady-state entanglement under continuous pumping. In both cases, we show that large values for the concurrence are attainable for qubit-qubit distances larger than the operating wavelength by using plasmonic waveguides that are currently available.