Related papers: Multiple mobility rings in non-Hermitian Su-Schrieffer-Heeger chain with quasiperiodic potentials

Multiple mobility rings in non-Hermitian Su-Schrieffer-Heeger chain with quasiperiodic potentials

URL: http://arxiv.org/abs/2601.20479v1
Date: Wed, 28 Jan 2026 10:49:00 GMT
Title: Multiple mobility rings in non-Hermitian Su-Schrieffer-Heeger chain with quasiperiodic potentials
Authors: Guan-Qiang Li, Zhi-Yu Lin, You-Jiao Dong, Ya-Feng Xue, Chun-Yang Ren, Ping Peng,
Abstract summary: The localization property of a non-Hermitian Su-Schrieffer-Heeger (SSH) chain with quasi-periodic on-site potential is investigated.<n>The energy spectra and eigenstate distributions of the system's Hamiltonian near the boundary of the phase transition exhibit different behaviors.
Score: 3.2883356348728827
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: The localization property of a non-Hermitian Su-Schrieffer-Heeger (SSH) chain with quasi-periodic on-site potential is investigated. In contrast to the preceding investigations, the quantum phase transition between localized state and extended one is achieved by adjusting the strength of intracellular or intercellular hopping. The energy spectra and eigenstate distributions of the system's Hamiltonian near the boundary of the phase transition exhibit different behaviors when the Hermiticity, non-Hermiticity and mosaic modulation of the quasi-periodic potential are considered, respectively. The existence of the mobility ring is revealed in the non-Hermitian SSH chain by studying of the critical behaviors near the boundary. More interestingly, the multiple mobility rings emerge when the period number of the mosaic modulation is increased. The result is helpful for the investigation of the localization-delocalization transition in the SSH-type system under the combined action of the non-Hermiticity and quasi-periodicity.

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