Osaka University

Published purpose

A coherent photon-to-spin interface hosted by a direct bandgap semiconductor quantum dot circuit can be a key component in practical quantum “Internet of Things” systems at the crossroads of hybridizing single-photon and single-electron platforms, i.e., Quantum photonics meets Quantum electronics. The application space covers distributed entanglement for long distance secure quantum communication (quantum repeater) and the integration of remote networked quantum sensors to a quantum memory or a quantum processor. Sensing of photo-generated carriers heralding the arrival of photonic qubits without destroying the encoded quantum information forms the front-end of the interface, and back-end quantum sensing of spin states enables quantum information processing functionality such as “enforcing” remote entanglement by Bell state measurement. The project will explore quantum dot circuits based on a Gallium Arsenide (GaAs) semiconductor platform. The Project will involve collaborative research to investigate strategies to stabilize the photon-spin interface circuit and to enhance the quantum state transfer efficiency. A final outcome will be to evaluate the performance of the photon-to-spin interface circuit in the line-of-sight delivery system, and the delivery system itself.