关键词: 量子光学, 量子测量极限, 海森堡极限, 费雪信息

Abstract: Quantum technology gives scientists the ability to manipulate photons directly,making measurements far more accurate than traditional systems of light radiation.But what is the limit to the accuracy of this measurement? Can more accurate measurements be achieved? In order to solve the above problems,this paper starts from the quantum measurement theory,summarizes the exploration of the uncertainty limit of quantum measurement in recent years,and gives a concise description of the specific technology and methods involved.This paper also reviews the basic tools and techniques of quantum optics related to metrology,describes the main protocols and strategies for achieving quantum-enhanced optical measurement,and summarizes the main experimental results and breakthroughs in this field.Finally,in order to promote the quantum optical metrology technology,the future development direction of the instrument field is discussed.

Key words: Quantum optics, Quantum measurement limit, Heisenberg limit, Fisher information