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Topologically Protected States in One-Dimensional Systems, Paperback / softback Book

Topologically Protected States in One-Dimensional Systems Paperback / softback

Part of the Memoirs of the American Mathematical Society series

Paperback / softback

Description

The authors study a class of periodic Schrodinger operators, which in distinguished cases can be proved to have linear band-crossings or ``Dirac points''.

They then show that the introduction of an ``edge'', via adiabatic modulation of these periodic potentials by a domain wall, results in the bifurcation of spatially localized ``edge states''.

These bound states are associated with the topologically protected zero-energy mode of an asymptotic one-dimensional Dirac operator.

The authors' model captures many aspects of the phenomenon of topologically protected edge states for two-dimensional bulk structures such as the honeycomb structure of graphene.

The states the authors construct can be realized as highly robust TM-electromagnetic modes for a class of photonic waveguides with a phase-defect.

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