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

报 告 人：邓东灵，清华大学交叉信息研究院助理教授

报告时间：2024-04-25 16:00

报告地点：理学院郑裕彤大讲堂

报告摘要：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.

References:

[1] Xu et al., Chin. Phys. Lett. 40, 060301 (2023).

[2] Xu et al., arXiv:2404.00091v1

报告人简介：邓东灵，清华大学交叉信息研究院助理教授，博士生导师，海外高层次人才青年项目、国家级人才基金获得者。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。