In this talk, I will discuss our work on the spin dynamics of many-body bound states in the one-dimensional spin-1/2 antiferromagnetic XXZ model. Using the algebraic Bethe ansatz method, we are able to systematically study the dynamical spin structure factors of this model under longitudinal magnetic fields. In particular, at intermediate and high energies, the spin dynamics are found to be dominated by many-body excitations involving multi-magnon bound states. The theoretical predictions are in excellent agreements with the electron spin resonance and inelastic neutron scattering experiments. 

报告人简介    

杨望，南开大学物理学院教授。2012年获清华大学学士学位，2018年于加州大学圣地亚哥分校获博士学位。2018-2023年在不列颠哥伦比亚大学物理系从事博士后研究。

研究领域为凝聚态强关联物理及量子计算，包括一维强关联系统、量子可积模型中的动力学、基于测量的量子计算、非常规超导体等。

邀请人

田矗舜 研究员