Scientists create new device to light up the way for quantum technologies

Phys.orgĀ  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 processing. The sub-diffraction focusing of the waveguide is shown to achieve cavity-free dynamic entanglement. This greatly reduces fabrication constraints and increases the speed and scalability of nanophotonic quantum devices…read more. TECHNICAL ARTICLE

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