Digital quantum simulation of Floquet topological phases with a solid-state quantum simulator  

作　　者：BING CHEN SHUO LI XIANFEI HOU FEIFEI GE FEIFEI ZHOU PENG QIAN FENG MEI SUOTANG JIA NANYANG XU HENG SHEN 

机构地区：[1]School of Electronic Science and Applied Physics,Hefei University of Technology,Hefei 230009,China [2]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University,Taiyuan 030006,China [3]Stanford Institute for Materials and Energy Sciences,Menlo Park,California 94025,USA [4]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan 030006,China [5]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China [6]Clarendon Laboratory,University of Oxford,Oxford 0X13PU,UK

出　　处：《Photonics Research》2021年第1期81-87,共7页光子学研究（英文版）

基　　金：National Key Research and Development Program of China(2020YFA0309400,2017YFA0304203,2018YFA0306600,2018YFF01012500);Newton Fund(NF170876);Fund for Shanxi 1331 Project Key Subjects Construction and 111 Project(D18001);PCSIRT(IRT-17R70);National Natural Science Foundation of China(11604069,11904070,12074234);Fundamental Research Funds for the Central Universities(PA2019GDQT0023);Program of State Key Laboratory of Quantum Optics and Quantum Optics Devices(KF201802)。

摘　　要：Harnessing the dynamics of complex quantum systems is an area of much interest and a quantum simulator has emerged as a promising platform to probe exotic topological phases.Since the flexibility offered by various controllable quantum systems has helped gain insight into the quantum simulation of such complicated problems,an analog quantum simulator has recently shown its feasibility to tackle the problems of exploring topological phases.However,digital quantum simulation and the detection of topological phases still remain elusive.Here,we develop and experimentally realize the digital quantum simulation of topological phases with a solid-state quantum simulator at room temperature.Distinct from previous works dealing with static topological phases,the topological phases emulated here are Floquet topological phases.Furthermore,we also illustrate the procedure of digitally simulating a quantum quench and observing the nonequilibrium dynamics of Floquet topological phases.Using a quantum quench,the 0-andπ-energy topological invariants are unambiguously detected through measuring time-averaged spin polarizations.We believe our experiment opens up a new avenue to digitally simulate and detect Floquet topological phases with fast-developed programmable quantum simulators.

关 键 词：temperature. TOPOLOGICAL QUANTUM 

分 类 号：O413[理学—理论物理]