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Edge states for second order elliptic operators in a channel
Published 30 Jan 2021 in math.AP, cond-mat.mtrl-sci, math-ph, and math.MP | (2102.00275v2)
Abstract: We present a general framework to study edge states for second order elliptic operators in a half channel. We associate an integer valued index to some bulk materials, and we prove that for any junction between two such materials, localised states must appear at the boundary whenever the indices differ.
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