Cascade of topological phase transitions and revival of topological zero modes in imperfect double helical liquids
The research investigates how imperfections like asymmetry in pairing and interactions, along with random spin-flip disorder, enrich two parallel helical edge channels. It shows that these imperfections act as a tuning knob, enabling a cascade of topological phase transitions and the revival of Majorana zero modes. This means disorder can qualitatively reshape topological superconductivity.