Abstract
Over the last two decades, integrated photonics has profoundly revolutionized the domain of quantum technologies. The ongoing second quantum revolution stands as a timely opportunity for a state-of-the-art review and, most important, an exploration of the directions undertaken by integrated quantum photonics. Within this perspective, based on the recent advances, we discuss the current challenges and future trends related to different technological platforms. Key examples will be considered across various subfields, including quantum communication, quantum metrology, and quantum memories. Our discussion encompasses disruptive concepts, progress, and potential limitations. The main objective of this Perspective is to provide the reader with a forward-looking discussion ranging from state-of-the-art developments to open challenges of the field.
- Received 28 October 2022
- Revised 24 October 2023
DOI:https://doi.org/10.1103/PRXQuantum.5.010101
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Published by the American Physical Society
Physics Subject Headings (PhySH)
Popular Summary
This Perspective explores the landscape and the impact of integrated quantum photonics in, and for, quantum technologies. It encompasses the on-chip generation, manipulation, storage, and detection of photonic quantum information, showcased through applications in quantum communication and metrology. A historical point of view is outlined, tracing the (r)evolutionary path of integrated photonics, highlighting both its transformative and embedding roles in the second quantum revolution.
A significant portion of this Perspective is dedicated to an in-depth discussion of the main quantum photonic platforms, including silicon, lithium niobate, III-V semiconductors, and silica. In addition, the hybridization of these platforms is explored, presenting performance evaluation on several important criteria and highlighting their complementarity. Naturally, the discussion encompasses key subfields, such as quantum key distribution, multimode quantum optics, photonic quantum sensors, as well as quantum memories and repeaters.
Beyond current developments of photonic quantum technologies, challenges ahead are discussed. By illustrating the dynamic and innovative environment of integrated quantum photonics, perspectives ranging from concept to systems are presented with the aim of pushing the frontiers of practical applications.
