(上海交通大学物理与天文学院)
报告摘要:
Symmetry-protected topological edge modes are one of the most remarkable phenomena in topological physics. In this talk, we formulate and quantitatively examine the effect of a quantum bath on these topological edge modes. Using the density matrix renormalization group method, we study the ground state of a composite system of spin-1 quantum chain, where the system and the bath degrees of freedom are treated on the same footing. We focus on the dependence of these edge modes on the global/partial symmetries of system-bath coupling and on the features of the quantum bath. It is shown that the time-reversal symmetry(TRS) plays a special role for an open quantum system, where an emergent partial TRS breaking will result in a TRS-protected topological mode diffusing from the system edge into the bath, thus make it useless for quantum computation.
个人简介：
蔡子，上海交通大学特别研究员。 2010年中科院研究网获得博士学位。先后在美国加州大学圣迭戈分校，德国慕尼黑大学，奥地利科学院量子光学与量子信息研究网从事博士后研究。主要研究方向为量子多体物理中的理论和数值计算。研究领域包括凝聚态物理，冷原子系统，以及量子开放系统中涌现的的强关联物理。
联系人：王磊 82649853