物理学院学术报告（第52期）

报告题目：Braiding non-Abelian anyons on a programmable superconducting processor

报告专家：邓东灵研究员    清华大学

报告时间：2024年07月12日（周五）14:30

报告地点：理6栋302      邀请人：朱诗亮

报告内容：

Non-Abelian anyons are exotic quasiparticle excitations hosted by certain topologically-ordered phases of matter. They are the building blocks of topological quantum computing. In this talk, I will first give a brief introduction to non-Abelian anyons and then report two recent experimental quantum digital simulation of braiding non-Abelian anyons on a programable superconducting processor. In the first experiment, we prepare the ground states of the toric-code model with twists, and demonstrate that twists behave as Ising anyons, exhibiting the same fusion rules and non-Abelian braiding statistics of the Ising type. They can be explored to encode topological logical qubits and both single- and two-qubit logic gates can be implemented by braiding them. In the second experiment, we exploit efficient quantum circuits to prepare the non-Abelian topologically ordered ground states of the Fibonacci string-net model and demonstrate braidings of Fibonacci anyons featuring universal computational power. In particular, we create two pairs of Fibonacci quasiparticle excitations by acting string operators on the prepared ground states and demonstrate their nontrivial mutual statistics by braiding them with sequences supporting universal single-qubit logic gates.

专家简介：

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。现任剑桥大学出版社杂志《Research Directions: Quantum Technologies》执行编辑，《Communications in Theoretical Physics》编委。2021年获天津市自然科学一等奖（第二完成人），2022年获年度清华大学“先进工作者”称号。主要研究方向为量子人工智能，在Nature, Nature/Science子刊，PRL/PRX等期刊上发表论文90余篇。