报告题目： Observation of topological time crystals with superconducting qubits

报告时间: 3月21日周四下午2:30-5:00

报告地点：9409报告厅

报告人： 邓东灵 清华大学

报告摘要: Quantum many-body systems away from equilibrium host a rich variety of exotic phenomena that are forbidden by equilibrium thermodynamics. A prominent example is that of discrete time crystals, where time translational symmetry is spontaneously broken in periodically driven systems. In this talk, I will report the observation of a distinct type of intrinsically non-equilibrium state of matter, topological time crystals, which are implemented through digital quantum simulation with an array of programmable superconducting qubits. Unlike the conventional time crystals reported in previous experiments, where spontaneous breaking of the discrete time translational symmetry occurs for local observables throughout the whole system, the topological time crystals observed in our experiment breaks the time translational symmetry only at the boundaries and have trivial dynamics in the bulk.

参考文献: Zhang et al., Nature 607, 468 (2022).

报告人简介:

邓东灵，清华大学交叉信息研究院特别研究员，博士生导师，海外高层次人才青年项目、国家杰出青年科学基金获得者。2007年获南开大学物理、数学双学士学位，2015年博士毕业于美国密西根大学，博士论文获“Kent M. Terwilliger Memorial Thesis Prize”奖。2015-2018年在马里兰大学联合量子研究所从事博士后研究，2018年回国入职清华大学。主要研究方向为量子人工智能，已在Nature,Nature/Science子刊，PRL/PRX等期刊上发表论文90余篇。