期刊
PHYSICAL REVIEW LETTERS
卷 114, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.056801
关键词
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资金
- NSF [DMR-1410435]
- Packard Foundation
- Institute for Quantum Information and Matter
- NSF Physics Frontiers Center
- Gordon and Betty Moore Foundation
- Bi-National Science Foundation
- ICore: the Israeli Excellence Center Circle of Light
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1410435] Funding Source: National Science Foundation
We investigate the possibility of realizing a disorder-induced topological Floquet spectrum in two-dimensional periodically driven systems. Such a state would be a dynamical realization of the topological Anderson insulator. We establish that a disorder-induced trivial-to-topological transition indeed occurs, and characterize it by computing the disorder averaged Bott index, suitably defined for the time-dependent system. The presence of edge states in the topological state is confirmed by exact numerical time evolution of wave packets on the edge of the system. We consider the optimal driving regime for experimentally observing the Floquet topological Anderson insulator, and discuss its possible realization in photonic lattices.
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