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- W3048600137 abstract "We address the conditions required for a $mathbb{Z}$ topological classification in the most general form of the non-Hermitian Su-Schrieffer-Heeger (SSH) model. Any chirally symmetric SSH model will possess a ``conjugated-pseudo-Hermiticity'' which we show is responsible for a quantized ``complex'' Berry phase. Consequently, we provide an example where the complex Berry phase of a band is used as a quantized invariant to predict the existence of gapless edge modes in a non-Hermitian model. The chirally broken, $PT$-symmetric model is studied; we suggest an explanation for why the topological invariant is a global property of the Hamiltonian. A geometrical picture is provided by examining eigenvector evolution on the Bloch sphere. We justify our analysis numerically and discuss relevant applications." @default.
- W3048600137 created "2020-08-18" @default.
- W3048600137 creator A5024078437 @default.
- W3048600137 date "2018-01-01" @default.
- W3048600137 modified "2023-10-18" @default.
- W3048600137 title "Topological Phases in the Non-Hermitian Su-Schrieffer-Heeger Model" @default.
- W3048600137 hasPublicationYear "2018" @default.
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