Phys.org  July 7, 2020 An international team of researchers (Ireland, UK) report theoretical statistics of 1- and 2-qubit (bipartite) systems, namely, photon antibunching and entanglement, of near-field excited quantum emitters. The sub-diffraction focusing of a plasmonic waveguide is shown to generate enough power over a sufficiently small region to strongly drive quantum emitters. This enables ultrafast single-photon emission as well as creates entangled states between two emitters when performing a controlled-NOT operation. The use of a movable plasmonic waveguide, in lieu of stationary nanostructures, allows high-speed rasterization between sets of qubits and enables spatially flexible data storage and quantum information […]