SinglePass · A cold-atom photonic-crystal-waveguide interface for efficient quantum operations in single pass
Horizon 2020 — Marie Skłodowska-Curie Actions
- Duration
- 2021-03-01 → 2023-02-28
- EU contribution
- €184,708
- Participants
- 1
- Scheme
- MSCA-IF
Lines connect the coordinator with its partners.
Results in brief
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.
Data: CORDIS, © European Union
Project objective
Deterministic nonlinear operations between single photons that are at the heart of numerous quantum information protocols require strong interactions between photons and quantum emitters. By combining cold atoms and slow-mode photonic-crystal waveguides, the goal of this project is to develop a novel platform to implement such operations by strongly coupling a photon with atomic ensembles in single pass, that is without the use of an optical cavity. Transverse optical confinement and slow group velocity are the key ingredients in this novel waveguide-QED approach, with applications in integrated quantum technologies, quantum non-linear optics and state engineering. This platform, based on a new and promising combination of photonic-crystal geometry (W1) and material (GaInP) will not only provide superior figures of merit and scalability than in free-space implementations, but also tailored functionalities not achievable in current physical interfaces. This project uniquely combines atomic physics, quantum optics and nanophotonics and will ideally prepare the applicant for a future career as an independent research group leader.
Original text from CORDIS.
Participants
- SORBONNE UNIVERSITE · ParisCoordinatorFrance
Links
Data: CORDIS, © European Union