基于量子压缩的相干光计算系统

COHERENT LIGHT COMPUTING SYSTEM BASED ON QUANTUM SQUEEZING

相干光计算是一种基于量子光学的非冯诺依曼框架的专用计算方法,是有望在后摩尔时代突破计算性能与功耗瓶颈的热门计算技术。相干光计算的核心思想是根据最小增益原理,通过从振荡阈值以下逐渐增加简并光学参量振荡器中泵浦光的强度,使得振荡器中最低能量的基态模式被激发,从而完成一种类似物理退火的过程。这种退火过程可被用于求解组合优化问题,并具备计算速度快、求解质量高和功耗低等优势。相干光计算机也被称为相干伊辛机(Coherent Ising Machines),可用于交通流分配、工业资源调度、金融投资组合等问题的快速高质量求解,是量子计算硬件的重要研究方向。本文作为“先进算力技术”专题的第二篇,介绍了相干光计算和相干伊辛机的基本原理、历史发展以及实验系统。本文不仅可以作为未来计算技术领域的一般性了解,本文附录给出的PPT课件也可以作为大学物理等课程中“量子物理”相关篇章的有益补充。

Coherent light computing is a specialized computational method based on quantum optics and non von Neumann frameworks,which is expected to break through the bottleneck of computational performance and power consumption in the post Moore era.The core idea of coherent light calculation is based on the principle of minimum gain.By gradually increasing the intensity of the pump light in the degenerate optical parametric oscillator,the lowest energy ground state mode in the oscillator is excited,thus completing a process similar to physical annealing.This annealing process can be used to solve combinatorial optimization problems and has advantages such as fast computation speed,high solution quality,and low power consumption.Coherent optical computers,also known as Coherent Ising Machines,can be used for fast and high-quality solutions to problems such as traffic flow allocation,industrial resource scheduling,and financial investment portfolios.They are an important research direction in quantum computing hardware.This paper,as the second part of the“Advanced Computational Power Technology”topic,introduces the basic principles,historical development and experimental systems of coherent optical computing and coherent Ising machines.This paper not only serves as a general introduction to the future field of computing technology,but the PPT given in the appendix also serves as a useful supplement to the“Quantum Phys-ics”chapter in university physics and other courses.