Details

Autor(en) / Beteiligte

• 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

Titel

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

Ist Teil von

• Physical review letters, 2018-09, Vol.121 (10), p.100502-100502, Article 100502

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2018

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• 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.