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- W2891857191 abstract "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 $51ifmmodetimeselsetexttimesfi{}51$ 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." @default.
- W2891857191 created "2018-09-27" @default.
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- W2891857191 date "2018-09-06" @default.
- W2891857191 modified "2023-10-17" @default.
- W2891857191 title "Observation of Topologically Protected Edge States in a Photonic Two-Dimensional Quantum Walk" @default.
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- W2891857191 doi "https://doi.org/10.1103/physrevlett.121.100502" @default.
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