SinglePass · A cold-atom photonic-crystal-waveguide interface for efficient quantum operations in single pass

A cold-atom photonic-crystal-waveguide interface for efficient quantum operations in single pass

Processing quantum information at the nodes of a quantum network requires the implementation of a deterministic coupling with another qubit, in the form of a material quantum system, through nonlinear quantum optics. A novel approach for achieving the strong photon-qubit coupling required for nonlinear quantum optical protocols relies on the emerging field of integrated photonic nanostructures, waveguides in particular, coupled to emitters. This new paradigm relies on two ingredients to enhance the atom-photon coupling. In a nanophotonic waveguide, the optical mode is readily confined, providing a transversal increase in energy density. Longitudinal structuration can further enhance the coupling by manipulating the dispersion relation to exploit slow modes near the optical band gap. Coupling atoms to such integrated photonic nanostructures would enable to scale up to ensembles of quantum emitters by harnessing their inherent indistinguishability. SinglePass aimed at coupling atoms to Photonic Crystal Waveguides (PCW) exhibiting slow modes for enhancing the atom-light coupling. Reaching the strong coupling regime with such a waveguide quantum electrodynamics (wQED) platform with atoms offers the prospect of realizing for instance an all-guided single-photon transistor in single pass. The fellow obtained a permanent academic position during the course of the fellowship, which led to the early termination of the action.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз