Roberto Morandotti
INRS-EMT, Canada
Title: On-chip quantum frequency combs for scalable quantum state generation
Biography
Biography: Roberto Morandotti
Abstract
Optical quantum states are fundamental for several applications ranging from sensing and secure communications to quantum computation. The generation of such quantum states on a compact integrated platform will allow for customizable, low-cost, and large-scale implementations, enabling accessible advances for quantum technologies. With current advances in optical quantum information processing (e.g. the realization of the first commercial quantum cryptography systems and computers), it is foreseeable that such reliable, low-cost and scalable on-chip sources of single and entangled photons will represent a key enabling technology for quantum applications. Therefore, the realization of integrated quantum sources has attracted considerable attention from the scientific community. However, major difficulties arise when sources need to satisfy several requirements at the same time, i.e. a narrow spectral bandwidth, high-purity single-mode generation, high production rates, stable long-term operation, multiplexed broadband operation, and high-quality entanglement shared between photons. We show that integrated quantum frequency comb sources can address these important requirements. We demonstrate the generation of pure heralded single photons, cross-polarized photon pairs, as well as entangled two- and multi-photon photon states, distributed over many frequency modes and spanning the complete fiber-optical telecommunications band. Integrated quantum frequency combs therefore provide a scalable and versatile platform for quantum information processing.