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Detangling Flat Bands into Fano Lattices
Sergej Flach, Daniel Leykam, Joshua D. Bodyfelt +2
Macroscopically degenerate flat bands (FB) in periodic lattices host compact localized states which appear due to destructive interference and local symmetry. Interference provides…
Flat band states: disorder and nonlinearity
Daniel Leykam, Sergej Flach, Omri Bahat-Treidel +1
We study the critical behaviour of Anderson localized modes near intersecting flat and dispersive bands in the quasi-one-dimensional diamond ladder with weak diagonal disorder .…
Discrete vortex solitons and PT symmetry
Daniel Leykam, Vladimir V. Konotop, Anton S. Desyatnikov
We study the effect of lifting the degeneracy of vortex modes with a PT symmetric defect, using discrete vortices in a circular array of nonlinear waveguides as an example. When th…