报告人：艾青

单位：北京师范大学

报告时间：2026年6月23日 星期二 10:00

报告地点：知新楼C913

邀请人：赵培茈

报告内容：Coherent Ising Machine beyond Quantum Computing

报告摘要：Generally speaking, the coherent Ising machine (CIM) is widely used in quantum computing. In this talk, we theoretically show that the CIM can be used to study quantum phase transition, and design schemes for criticality-enhanced quantum metrology. Furthermore, after finishing the quantum computing, the CIM can be used as a quantum battery and the energy therein can be used to supply other quantum devices. Quantum criticality has received extensive attention due to its ability to significantly enhance quantum sensing. But its realization and control in many-body quantum systems remain challenging. We present an effective scheme to simulate the Lipkin–Meshkov–Glick (LMG) model using a CIM composed of a network of degenerate optical parametric oscillators (DOPO). In our work, the spin variables of the LMG model are mapped onto the phases of DOPO pulses, and the spin–spin interactions are realized by all-to-all couplings among them. Through our investigation of the critical behavior in the antiferromagnetically coupled LMG model in the thermodynamic limit, i.e. N → ∞, and its application in quantum sensing near the critical point, we verify that the CIM does not only effectively capture the second-order quantum phase transition (QPT) at the critical point but also reconstructs its complete phase diagram under ferromagnetic coupling. Furthermore, we demonstrate how the critical dynamics of this simulation platform can be utilized for quantum-enhanced metrology, achieving a measurement precision that diverges near the critical point of the LMG model. These results highlight the capability of the CIM as a flexible experimental platform for investigating the QPT in the fundamental quantum magnetic models, providing valuable insights into quantum simulation and critical phenomena.

报告人简介：艾清，北京师范大学物理与天文学院副教授。博士毕业于清华大学，担任Frontiers in Physics副主编、Scientific Reports编委（2016-2025）、Frontiers of Physics和The Innovation Energy青年编委，中国计算机协会量子计算专业委员会执委，Nature Communications、Physical Review Letters等20余家国内外著名期刊的审稿人，国家自然科学基金委重大项目评审专家。荣获2019年高校物理基础课程青年教师讲课比赛北京赛区二等奖。培养20余位研究生，在北京理工大学等高校担任教职。主要从事量子物理与量子信息研究，在Physical Review Letters 、npj Quantum Information、Journal of Physical Chemistry Letters 、Journal of Chemical Theory and Computation和Quantum Science and Technology等学术期刊发表论文86篇，被引2700余次，H因子27。