Quantum computation and optical technology

Michael Brooks

Dipankar Bhattacharyya, Jyotirmoy Guha

Kaustav Bhowmick, Joseph Bamidele Awotunde

Optical or photonic computing and quantum computing are being seen as the key enabler of today's and tomorrow's scientific and technological advancement. As industrial automation moves from Industry 4.0 to Industry 5.0, the features characterizing the same would be largely based on either of these technologies. In this chapter, the state-of-the-art of optical computing and quantum computing have been reviewed in order to look into their contribution in the advancement of industrial automation. Starting with the basic building blocks of scientific technology, readers have been introduced to the various sectors that involve the said enabling platforms. Readers have also been presented with a lucid flow from Industry 4.0 to Industry 6 based on the enabling philosophy, while outlining the goodness of optical and quantum technology, bringing about sustainable development. The drawbacks of the same have also been enumerated for the responsible citizens of the present generation. Necessary illustrations and tabulation have been provided to help new readers have a visual understanding of the principles and categorizations. Overall, this chapter makes readers understand the impact of optical and quantum computing in the present industrial transition irrespective of their technological background.

Timothy C. Ralph, Geoff J. Pryde

Kosuke Fukui, Shuntaro Takeda

Abstract Realizing a large-scale quantum computer requires hardware platforms that can simultaneously achieve universality, scalability, and fault tolerance. As a viable pathway to meeting these requirements, quantum computation (QC) based on continuous-variable optical systems has recently gained more attention due to its unique advantages and approaches. This review introduces several topics of recent experimental and theoretical progress in the optical continuous-variable QC that we believe are promising. In particular, we focus on scaling-up technologies enabled by time multiplexing, bandwidth broadening, and integrated optics, as well as hardware-efficient and robust bosonic quantum error-correction schemes.

Toshikazu Hashimoto, Takeshi Umeki, Takahiro Kashiwazaki +1 more

Quantum computers are increasingly seen as a potential solution for computing problems that are difficult to solve with conventional technologies.A photon-based quantum computer is a promising technology that enables the development of large-scale, universal quantum computing at high speeds at room temperature with large-scale quantum entanglement thanks to photons' inherent characteristics.This article explores NTT's efforts to develop optical quantum computers using optical fiber communication technology.