Emergence of synthetic twist defects in the surface code under local perturbation
Creating quantum defects on demand by tweaking a material's surface
Researchers showed how to create special quantum defects by slightly disturbing a topologically ordered quantum system — defects that could enable a new form of quantum computing through defect braiding. The team mapped out the energy spectrum of these synthetic defects and pinpointed the quantum phase transition that triggers their emergence, filling a gap in a decade-old theoretical proposal that had never been systematically tested.
Defects that obey non-Abelian statistics are a leading candidate for fault-tolerant quantum computers, but creating them reliably remains a major challenge. This work provides the theoretical foundation and numerical roadmap for experimentalists to generate and control these defects dynamically rather than building them into a material statically — a potentially simpler path to quantum computing hardware.