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  www.dicp.cas.cn    发布时间:2016-11-21    供稿部门:1109组、科技处
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报告题目:Spin Ring-exchange Interactions and Anyonic Fractional Statistics in Optical Lattices

报告时间:20161123日(星期三)15:00-16:30

报告地点:分子反应动力学楼三楼会议室

报告人:苑震生 教授

中国科学技术大学

    报告摘要: 

    Ring exchange is an elementary interaction for modeling unconventional topological matters which hold promise for efficient quantum information processing. We report the observation of four-body ring-exchange interactions and the topological properties of anyonic excitations within an ultracold atom system.

    A minimum toric code Hamiltonian, in which the ring exchange is the dominant term, was implemented in disconnected four-spin plaquette arrays formed by two orthogonal superlattices. The ring-exchange interactions were resolved from the dynamical evolutions of the spin orders in each plaquette, matching well with the predicted energy gaps between two anyonic excitations of the spin system. A braiding operation was applied to the spins in the plaquettes and an induced phase 1.00(3) π in the four-spin state was observed, confirming (1/2)-anynoic statistics. This work represents an essential step towards studying topological matters with ultracold atoms and will contribute to the development of topological quantum computing.

  报告人简介 

    苑震生,男,19767月出生,中国科学技术大学合肥微尺度物质科学国家实验室教授,入选中科院“百人计划”(2011年)。19986月获中国科大理学学士学位,200307月获中国科大理学博士学位。2006年至2011年任德国海德堡大学博士后、洪堡学者、高级研究员及项目共同负责人,2011年至今任中国科大教授。主要从事光与冷原子量子信息处理研究。近年来在Nature(1)Nature子刊(5)Physical Review Letters(6)Phys. Reports(1)PNAS(1)Physical Review A(10)等国际权威学术期刊上发表40余篇研究论文,总引用2000多次(google scholar)。成果先后入选20072008年度两院院士评选的“中国十大科技进展新闻”,入选2008年欧洲“物理学会年度重大物理学进展”。在基金委“单量子”重大研究重点项目“冷原子系综单集体激发态的操纵、转化及退相干研究”(2013-2016)中担任项目负责人、在科技部973计划“基于光与冷原子的量子物理和量子信息”(2011-2015)中担任课题负责人、在科技部重点研发计划2016年度“基子超原子气体的量子模拟”中担任课题负责人。

  报告联系人:1109 杨瑞霞 9910

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