Topological Floquet interface states in optical fiber loops

2020/10/14 by Арстан Бисянов, Arstan Bisianov, André Luiz Marques Muniz +4
Mathematics · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Floquet theory #Interface (matter) #Mathematics #Mechanical and Optical Resonators #Molecule #Nonlinear system #Physics #Quantum mechanics #Robustness (evolution) #Topological Materials and Phenomena #Topology (electrical circuits) #physics.optics #quant-ph

paper · pdf · doi:10.1103/physreva.102.053511

published as Phys. Rev. A 102, 053511 (2020) · 21 pages, 5 figures, submitted to Physical Review A

arxiv created 2020/10/14 · openalex created_date 2020/10/22 · openalex publication_date 2020/11/12 · arxiv updated 2020/11/18 · openalex updated_date 2026/08/05

Abstract

We experimentally observe a coexisting pair of topological anomalous Floquet interface states in a (1+1)-dimensional discrete photon walk. We explicitly verify the robustness of these states against local static perturbations respecting the chiral symmetry of the system, as well as their vulnerability against nonstationary perturbations. The walk is implemented based on pulses propagating in a pair of coupled fiber loops of dissimilar lengths with dynamically variable mutual coupling. The topological interface is created via phase modulation in one of the loops, which allows for an anomalous Floquet topological transition at the interface.

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