Recent progress on coherent computation based on quantum squeezing

• Published in: AAPPS bulletin Vol. 33; no. 1; pp. 7 - 8
• Main Authors: Lu, Bo, Liu, Lu, Song, Jun-Yang, Wen, Kai, Wang, Chuan
• Format: Journal Article
• Language: English
• Published: Singapore Springer Nature Singapore 01.03.2023; Springer Nature B.V; Springer
• Subjects: Astronomy; Astrophysics and Cosmology; Atomic; Energy; Gravitational waves; Information processing; Light; Molecular; Optical and Plasma Physics; Optics; Optimization; Particle and Nuclear Physics; Phase transitions; Physics; Physics and Astronomy; Quantum computing; Review Article
• ISSN: 2309-4710; 0218-2203; 2309-4710
• DOI: 10.1007/s43673-023-00077-4

Squeezed vacuum state of light is an important concept of quantum optics which has an uncertainty reduction in a specific quadrature compared to the coherent vacuum state. The coherent Ising machines (CIMs) based on the squeezed state are capable of searching the ground state of the Ising model, which can be used to solve combinatorial optimization problems and have been experimentally demonstrated to have excellent computational performance. This review introduces the recent progress of a CIM hardware solver based on optical parametric oscillators, including the delayed optical path scheme and a measurement feedback scheme. Also, the basic principles, unique advantages, and potential challenges are described. We expect that the applications of large-scale CIM hardware solvers will have a huge impact on the acceleration of the computation power.