2015/11/30 by Niklas M. Gergs, Lars Fritz, Dirk Schuricht · 87 citations
Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Business #Chain (unit) #Combinatorics #Condensed matter physics #Fermion #MAJORANA #Mathematics #Order (exchange) #Order and disorder #Physics #Quantum many-body systems #Quantum mechanics #Theoretical physics #Topological Materials and Phenomena #Topology (electrical circuits) #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.93.075129
published in Physical review. B./Physical review. B 93(7) (American Physical Society) · corrected version
openalex publication_date 2016/02/16 · arxiv created 2017/05/01 · arxiv updated 2017/05/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the combined effect of interactions and disorder on topological order in one dimension. Toward that end, we consider a generalized Kitaev chain including fermion-fermion interactions and disorder in the chemical potential. We determine the phase diagram by performing density-matrix renormalization-group calculations on the corresponding spin-1/2 chain. We find that moderate disorder or repulsive interactions individually stabilize the topological order, which remains valid for their combined effect. However, both repulsive and attractive interactions lead to a suppression of the topological phase at strong disorder.