Triple

Target class: topological phase effect
Context triple: [Aharonov–Casher effect, instanceOf, topological phase effect]

• A. quantum phase of matter
  A quantum phase of matter is a distinct state of a many-body quantum system characterized by unique patterns of quantum correlations and symmetries that remain stable under small changes in external conditions.
• B. topological defect
  A topological defect is a stable, localized irregularity in an ordered medium or field configuration that arises because the system’s topology prevents it from being continuously transformed into a uniform state.
• C. topological quantum field theory
  A topological quantum field theory is a quantum field theory whose observables and correlation functions depend only on the topology of the underlying spacetime manifold, not on its geometric details such as distances or angles.
• D. nonperturbative effect
  A nonperturbative effect is a physical phenomenon that cannot be captured by any finite-order expansion in a small parameter (such as a coupling constant) and instead arises from intrinsically non-linear or exponentially suppressed contributions, like instantons or tunneling.
• E. non-topological soliton
  A non-topological soliton is a stable, localized field configuration whose stability arises from conserved charges or dynamical effects rather than from the topology of the underlying field space.
• F. None of above. chosen