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Uncover Topology by Quantum Quench Dynamics.
Sun, Wei; Yi, Chang-Rui; Wang, Bao-Zong; Zhang, Wei-Wei; Sanders, Barry C; Xu, Xiao-Tian; Wang, Zong-Yao; Schmiedmayer, Joerg; Deng, Youjin; Liu, Xiong-Jun; Chen, Shuai; Pan, Jian-Wei.
Afiliación
  • Sun W; Shanghai Branch, National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Shanghai 201315, China.
  • Yi CR; Chinese Academy of Sciences Center for Excellence: Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei Anhui 230326, China.
  • Wang BZ; CAS-Alibaba Lab for Quantum Computation, Shanghai 201315, China.
  • Zhang WW; Shanghai Branch, National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Shanghai 201315, China.
  • Sanders BC; Chinese Academy of Sciences Center for Excellence: Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei Anhui 230326, China.
  • Xu XT; CAS-Alibaba Lab for Quantum Computation, Shanghai 201315, China.
  • Wang ZY; Shanghai Branch, National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Shanghai 201315, China.
  • Schmiedmayer J; Chinese Academy of Sciences Center for Excellence: Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei Anhui 230326, China.
  • Deng Y; International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China.
  • Liu XJ; Collaborative Innovation Center of Quantum Matter, Beijing 100871, China.
  • Chen S; Centre for Engineered Quantum Systems, School of Physics, The University of Sydney, Sydney, New South Wales 2006, Australia.
  • Pan JW; Shanghai Branch, National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Shanghai 201315, China.
Phys Rev Lett ; 121(25): 250403, 2018 Dec 21.
Article en En | MEDLINE | ID: mdl-30608809
Topological quantum states are characterized by nonlocal invariants. We present a new dynamical approach for ultracold-atom systems to uncover their band topology, and we provide solid evidence to demonstrate its experimental advantages. After quenching a two-dimensional (2D) Chern band, realized in an ultracold ^{87}Rb gas from a trivial to a topological parameter regime, we observe an emerging ring structure in the spin dynamics during the unitary evolution, which uniquely corresponds to the Chern number for the postquench band. By extracting 2D bulk topology from the 1D ring pattern, our scheme displays simplicity and is insensitive to perturbations. This insensitivity enables a high-precision determination of the full phase diagram for the system's band topology.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2018 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2018 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos