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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics I

Q 31.1: Poster

Dienstag, 7. März 2017, 17:00–19:00, P OG1+2

Observation of Four-body Ring-exchange Interaction and Anyonic Fractional Statistics — •Han-Ning Dai^1,2,3, Bing Yang^1,2,3, Andreas Reingruber^2,5, Hui Sun^1,3, Xiao-Fan Xu², Yu-Ao Chen^1,3,4, Zhen-Sheng Yuan^1,2,3,4, and Jian-Wei Pan^1,2,3,4 — ¹Hefei National Laboratory for Physical Science at Microscal and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China — ²Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany — ³CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China — ⁴CAS-Alibaba Quantum Computing Laboratory, Shanghai 201315, China — ⁵Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Erwin-Schroedinger-Strasse, Building 46, 67663 Kaiserslautern, Germany

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.