您现在的位置:首页 > 新闻动态 > 学术活动
 
【12.18】Experimentally Probing Topological Order and Its Breakdown via Modular Matrices
2017-12-15|文章来源: |【
 
Seminar
Title: Experimentally Probing Topological Order and Its Breakdown via Modular Matrices
Speaker: Prof. Yidun Wan (万义顿) (Fudan University)
Time: 4:00PM, Dec. 18th, 2017 (Monday)
Place: Theoretical Physics Division, 319

Abstract: The modern conception of phases of matter has undergone tremendous developments since the first observation of topologically ordered states in fractional quantum Hall systems in the 1980s. In this paper, we explore the question: In principle, how much detail of the physics of topological orders can be observed using state of the art technologies? We find that using surprisingly little data, namely the toric code Hamiltonian in the presence of generic disorders and detuning from its exactly solvable point, the modular matrices -- characterizing anyonic statistics that are some of the most fundamental fingerprints of topological orders -- can be reconstructed with very good accuracy solely by experimental means. This is a first experimental realization of these fundamental signatures of a topological order, a test of their robustness against perturbations, and a proof of principle -- that current technologies have attained the precision to identify phases of matter and, as such, probe an extended region of phase space around the soluble point before its breakdown. Given the special role of anyonic statistics in quantum computation, our work promises myriad applications in both probing and realistically harnessing these exotic phases of matter.

 
中国科学院高能物理研究所    备案序号:京ICP备05002790号    文保网安备案号:110402500050
地址:北京市918信箱    邮编:100049    电话:86-10-88235008    Email:ihep@ihep.ac.cn