报告题目：Construction of Non-Hermitian Parent Hamiltonian from Matrix Product States

报告专家：杨硕副教授    清华大学

报告时间：2023年7月4日10:30-11:40

报告地点：理6栋302

报告内容：

There are various research strategies used for non-Hermitian systems, which typically involve introducing non-Hermitian terms to pre-existing Hermitian Hamiltonians. It can be challenging to directly design non-Hermitian many-body models that exhibit unique features not found in Hermitian systems. In this Letter, we propose a new method to construct non-Hermitian many-body systems by generalizing the parent Hamiltonian method into non-Hermitian regimes. This allows us to build a local Hamiltonian using given matrix product states as its left and right ground states. We demonstrate this method by constructing a non-Hermitian spin-1 model from the asymmetric Affleck-Kennedy-Lieb-Tasaki (AKLT) state, which preserves both chiral order and symmetry-protected topological order. Our approach opens up a new paradigm for systematically constructing and studying non-Hermitian many-body systems, providing guiding principles to explore new properties and phenomena in non-Hermitian physics.

专家简介：

杨硕2006年本科毕业于南开大学，2010年博士毕业于中国科学院理论物理研究所。2010年至2017年先后在美国马里兰大学帕克分校、德国马克斯普朗克量子光学研究所、加拿大圆周理论物理研究所做博士后研究。2017年9月加入清华大学物理系，2019年晋升为副教授。她主要从事凝聚态理论和量子物理方面的研究工作，主要研究方向包括张量网络、拓扑量子态、凝聚态与量子信息的交叉。