A scalable platform for on-demand multi-photon states using coupled quantum dots

Abstract: Quantum technology has the potential to revolutionize computing, communication and imaging technology. Quantum imaging for example, promises to surpass classical limits in both resolution and sensitivity, but relies on the efficient generation of correlated multi-photon states. Its potential is therefore hindered by the stochastic nature of conventional sources like SPDC, which inefficiently produce multi-photon entangled states required for a quantum advantage. In this talk, I will outline my work towards building robust, scalable multi-photon sources using solid-state quantum dots (QDs) embedded in nanophotonic chips. I will describe how we deterministically integrate QDs into photonic waveguides using localisation techniques and how their emission properties are manipulated in structures such as cavities. A key focus is on the theoretical work and experimental demonstration of coupling multiple emitters via a shared optical mode to create scalable quantum systems, a platform that not only serves as a source of deterministic entangled photons but also as a testbed for exploring many-body quantum optics. This scalable approach represents a significant leap from probabilistic methods and is a vital step towards enabling the complex optical states required for the next generation of quantum technologies.