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 by engineering a Hubbard Hamiltonian that describes atomic spins in disconnected plaquette arrays formed by two orthogonal superlattices. The ring-exchange interactions were resolved from the dynamical evolutions in the spin orders, 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 $\frac{1}{2}$-anynoic statistics. This work represents an essential step towards studying topological matters with many-body systems and the applications in quantum computation and simulation.
Observation of anyonic thermodynamics and generalized Pauli principle
State Key Laboratory of Photonics and Communications, School of Electronics, Peking University(光电通信国家重点实验室,电子学院,北京大学);Institute of Carbon-based Thin Film Electronics, Peking University(碳基薄膜电子学研究所,北京大学);Center for Nonlinear Phenomena and Complex Systems, Université Libre de Bruxelles(非线性现象与复杂系统中心,布鲁塞尔自由大学)
Statistical delocalization in the Anyonic Aubry-André model
Donostia International Physics Center (DIPC)(多诺斯蒂亚国际物理中心);University of the Basque Country (UPV/EHU)(巴斯克大学);Technische Universität Berlin(柏林工业大学);IKERBASQUE, Basque Foundation for Science(伊克尔巴斯基奎,巴斯克科学基金会)
Probing the exchange statistics of one-dimensional anyon models
我们提出了可行的方案,用于揭示光晶格中一维任意子模型中的修改后的交换统计,该方案基于[{Phys. Rev. A 94,023615(2016)}]中引入的晶格深度调制方案的扩展。我们表明,快速调制的两个组件的费米格子气中存在的磁场梯度,在与额外的谐振微波场相结合,允许量子模拟的硬核任意子模型与周期性的边界条件。这样的半合成环设置允许实现对任意子统计敏感的干涉布置。此外,我们还表明,简单的膨胀实验可能会揭示形成的adherously绑定对导致的任意离子交换。
Statistics-governed dynamical scaling in interacting anyonic chains
National University of Defense Technology(国防科技大学);Université Libre de Bruxelles(布鲁塞尔自由大学);International Solvay Institutes(国际索尔维研究所);Southern University of Science and Technology(南方科技大学);Jilin University(吉林大学)
Exact statistical transmutation of quantum mixtures on a ring
Université Grenoble-Alpes(格勒诺布尔阿尔卑斯大学);CNRS(法国国家科学研究中心);LPMMC(低压与分子磁性物理实验室);Laboratoire Kastler Brossel(卡斯特勒-布罗塞尔实验室);Collège de France(法兰西公学院);ENS-Université PSL(巴黎高等师范学校-巴黎文理研究大学);Sorbonne Université(索邦大学);International Solvay Institutes(国际索尔维研究所);Center for Nonlinear Phenomena and Complex Systems(非线性现象与复杂系统中心);Université Libre de Bruxelles(布鲁塞尔自由大学);Université Côte d’Azur(蔚蓝海岸大学);Institut de Physique de Nice(尼斯物理研究所);Institut Universitaire de France(法兰西学院)
Multicomponent anyons in one-dimensional optical lattices
Rice University(莱斯大学);The University of Oklahoma(俄克拉荷马大学);Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences(中国科学院精密测量科学与技术创新研究院);Research School of Physics, Australian National University(澳大利亚国立大学物理研究学院)
Edge-state interferometry as a probe of local flux in isolated quantum Hall systems
Université Libre de Bruxelles(布鲁塞尔自由大学);International Solvay Institutes(国际索尔维研究所);Collège de France(法兰西公学院);CNRS(法国国家科学研究中心);ENS-Université PSL(巴黎高等师范学院-巴黎文理研究大学);Sorbonne Université(索邦大学);Technische Universität Berlin(柏林工业大学)