Observation of Topologically Protected Edge States in a Photonic Two-Dimensional Quantum Walk.

Chen, Chao; Ding, Xing; Qin, Jian; He, Yu; Luo, Yi-Han; Chen, Ming-Cheng; Liu, Chang; Wang, Xi-Lin; Zhang, Wei-Jun; Li, Hao; You, Li-Xing; Wang, Zhen; Wang, Da-Wei; Sanders, Barry C; Lu, Chao-Yang; Pan, Jian-Wei

Chen, Chao; Ding, Xing; Qin, Jian; He, Yu; Luo, Yi-Han; Chen, Ming-Cheng; Liu, Chang; Wang, Xi-Lin; Zhang, Wei-Jun; Li, Hao; You, Li-Xing; Wang, Zhen; Wang, Da-Wei; Sanders, Barry C; Lu, Chao-Yang; Pan, Jian-Wei.

Afiliación

Chen C; Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Shanghai Branch, Shanghai 201315, China.
Ding X; CAS-Alibaba Quantum Computing Laboratory, CAS Centre for Excellence in Quantum Information and Quantum Physics, Shanghai 201315, China.
Qin J; Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Shanghai Branch, Shanghai 201315, China.
He Y; CAS-Alibaba Quantum Computing Laboratory, CAS Centre for Excellence in Quantum Information and Quantum Physics, Shanghai 201315, China.
Luo YH; Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Shanghai Branch, Shanghai 201315, China.
Chen MC; CAS-Alibaba Quantum Computing Laboratory, CAS Centre for Excellence in Quantum Information and Quantum Physics, Shanghai 201315, China.
Liu C; Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Shanghai Branch, Shanghai 201315, China.
Wang XL; CAS-Alibaba Quantum Computing Laboratory, CAS Centre for Excellence in Quantum Information and Quantum Physics, Shanghai 201315, China.
Zhang WJ; Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Shanghai Branch, Shanghai 201315, China.
Li H; CAS-Alibaba Quantum Computing Laboratory, CAS Centre for Excellence in Quantum Information and Quantum Physics, Shanghai 201315, China.
You LX; Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Shanghai Branch, Shanghai 201315, China.
Wang Z; CAS-Alibaba Quantum Computing Laboratory, CAS Centre for Excellence in Quantum Information and Quantum Physics, Shanghai 201315, China.
Wang DW; Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Shanghai Branch, Shanghai 201315, China.
Sanders BC; CAS-Alibaba Quantum Computing Laboratory, CAS Centre for Excellence in Quantum Information and Quantum Physics, Shanghai 201315, China.
Lu CY; State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT).
Pan JW; State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT).

Phys Rev Lett ; 121(10): 100502, 2018 Sep 07.

Article en En | MEDLINE | ID: mdl-30240268

RESUMEN

Periodically driven systems have displayed a variety of fascinating phenomena without analogies in static systems, which enrich the classification of quantum phases of matter and stimulate a wide range of research interests. Here, we employ discrete-time quantum walks to investigate a nontrivial topological effect unique to a two-dimensional periodically driven system: chiral edge states can exist at the interface of Floquet insulators whose Chern numbers vanish. Thanks to a resource-saving and flexible fiber-loop architecture, we realize inhomogeneous two-dimensional quantum walks up to 25 steps, over an effective 51×51 lattice with tunable local parameters. Spin-polarized chiral edge states are observed at the boundary of two distinct quantum walk domains. Our results contribute to establishing a well-controlled platform for exploring nontrivial topological phases.

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Texto completo: 1 Bases de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2018 Tipo del documento: Article País de afiliación: China