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Field theoretical study of disorder in non-Hermitian topological models

Moustaj, Anouar ; Eek, Lumen ; Morais Smith, Cristiane

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Título:
Field theoretical study of disorder in non-Hermitian topological models
Autor: Moustaj, Anouar ; Eek, Lumen ; Morais Smith, Cristiane
Assuntos: Condensed Matter Physics ; Electronic, Optical and Magnetic Materials
Notas: Physical Review B 105(18), 1-6 (2022)
2469-9950
https://dspace.library.uu.nl/handle/1874/423768
Descrição: Non-Hermitian systems have provided a rich platform to study unconventional topological phases. These phases are usually robust against external perturbations that respect certain symmetries of the system. In this Letter, we provide a different method to analytically study the effect of disorder, using tools from quantum field theory applied to discrete models around the phase-transition points. We investigate two different one-dimensional models, the paradigmatic non-Hermitian Su-Schrieffer-Heeger model and an s-wave superconductor with imbalanced pairing. These analytic results are compared to numerical simulations in the discrete models. It is found that the systems are driven from a topological to a trivial phase in the same way.
Data de criação/publicação: 2022
Idioma: Inglês

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