Topological Anderson phase in quasi-periodic waveguide lattices

• URL: http://arxiv.org/abs/2008.06493v1
• Date: Fri, 14 Aug 2020 17:54:22 GMT
• Title: Topological Anderson phase in quasi-periodic waveguide lattices
• Authors: Stefano Longhi
• Abstract summary: We consider a Su-Schrieffer-Heeger (SSH) waveguide lattice in the trivial topological phase. We show that quasi-periodic disorder in the coupling constants can drive the lattice into a topological non-trivial phase.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The topological trivial band of a lattice can be driven into a topological phase by disorder in the system. This so-called topological Anderson phase has been predicted and observed for uncorrelated static disorder, while in the presence of correlated disorder conflicting results are found. Here we consider a Su-Schrieffer-Heeger (SSH) waveguide lattice in the trivial topological phase, and show that quasi-periodic disorder in the coupling constants can drive the lattice into a topological non-trivial phase. A method to detect the emergence of the topological Anderson phase, based on light dynamics at the edge of a quasi-periodic waveguide lattice, is suggested.

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