报告题目：Thermalization and oscillation dynamics in Rydberg atom systems

报  告 人：李伟斌（副教授）

报告日期：2025年8月28日 星期四

报告时间：下午16:30-17:30

报告地点：激光光谱研究所三层报告厅

报告简介：

        In this talk, I will first discuss a novel reciprocal Floquet thermalization mechanism in a chain of Rydberg atoms. We show that the reciprocal Floquet thermalization is triggered when combination of laser detuning and the Rydberg atom interaction and Floquet period are reciprocal pairs. This leads to many-body quantum chaos, evidenced by level spacing distribution and inverse participation ratio. Signatures of the thermalization can be found from stroboscopic evolution of the atom population.

      In the second part, I will discuss the oscillatory dynamics in many body systems. For example, in the dissipative time crystal,  observables (such as population, magnetization) oscillate persistently. It is believed that the time crystal forms in the thermodynamic limit, while the oscillatory dynamics is absent in finite systems. Typically, dynamics equilibrates to a steady state in the long time limit, which is the eigenstate of the master equation with zero eigenvalues. We develop a framework to engineer persistent oscillatory modes in finite, Markovian open quantum systems governed by a time-independent Lindblad master equation.

报告人简介：

       李伟斌，诺丁汉大学物理与天文学院副教授，博士导师。主要从事里德堡原子物理和量子光学、和量子计算等的研究，在Science,Nature,Phys. Rev. X,和Phys. Rev. Lett.等国际刊物上发表90余篇论文。主持承担欧盟、英国等多项科研项目。2010年获得欧盟玛丽-居里学者，2013年获得诺丁汉高等研究学者资助。担任Science,Phys.Rev.Lett.,Phys. Rev. X等学术杂志审稿人，兼任Scientific Reports的editorial board member和 Frontiers in Physics的associate editor。