Corrigions

Corrigions are a theoretical construct in condensed-matter physics and related high-energy analogues. They are emergent excitations proposed to arise in models of strongly correlated electron systems and topological phases, intended to supplement the standard quasiparticle picture. The term is used for composite objects that integrate charge, spin, and lattice degrees of freedom within a single excitation. In several proposals, corrigions can reside at domain walls, interfaces, or within quantum spin liquids, and may carry fractionalized quantum numbers or exhibit nontrivial exchange statistics in two spatial dimensions.

The properties of corrigions are model-dependent, but common themes include coupling between electronic and lattice (phonon) dynamics and potential long lifetimes protected by topology or symmetry. Theoretical descriptions often employ extended Hubbard- or t-J-like models, gauge-theory formulations with emergent fields, or Kitaev-type spin-liquid frameworks. Effective field theories may feature emergent gauge bosons interacting with matter fields representing corrigions, yielding distinctive transport and spectroscopic consequences.

Experimental status remains unsettled; there is no conclusive observation to date. Proposed signatures include anomalies in charge transport and noise, unusual features in spectroscopic probes such as scanning tunneling microscopy, angle-resolved photoemission, or neutron scattering, and characteristic thermodynamic responses at low temperatures. Experimental platforms suggested for studying corrigions include strongly correlated solids, frustrated magnets, and engineered cold-atom lattices where model controllability is high.

See also: anyons, polarons, spin liquids, topological matter. References to theoretical reviews and model papers exist, with ongoing efforts to identify unambiguous experimental signatures.