Roadmap on Integrated Quantum Photonics
Galan Moody, Volker J. Sorger, Daniel J. Blumenthal, Paul W., Juodawlkis, William Loh, Cheryl Sorace-Agaskar, Alex E. Jones, Krishna C., Balram, Jonathan C. F. Matthews, Anthony Laing, Marcelo Davanco, Lin Chang,, John E. Bowers, Niels Quack, Christophe Galland, Igor Aharonovich

TL;DR
This paper reviews the progress and future prospects of integrated quantum photonics, emphasizing the importance of QPICs in scaling quantum technologies for computing, communication, and sensing over the next decade.
Contribution
It provides a comprehensive roadmap outlining current advancements, challenges, and technological needs for large-scale, multi-functional quantum photonic integrated circuits.
Findings
Significant reduction in optical losses in QPICs
Advances in chip efficiency and robustness
Projected transition to large-scale quantum photonic systems
Abstract
Integrated photonics is at the heart of many classical technologies, from optical communications to biosensors, LIDAR, and data center fiber interconnects. There is strong evidence that these integrated technologies will play a key role in quantum systems as they grow from few-qubit prototypes to tens of thousands of qubits. The underlying laser and optical quantum technologies, with the required functionality and performance, can only be realized through the integration of these components onto quantum photonic integrated circuits (QPICs) with accompanying electronics. In the last decade, remarkable advances in quantum photonic integration and a dramatic reduction in optical losses have enabled benchtop experiments to be scaled down to prototype chips with improvements in efficiency, robustness, and key performance metrics. The reduction in size, weight, power, and improvement in…
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