Retrieving "Ising Model" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Symmetry Breaking

   Linked via "Ising model"

   If the vacuum manifold—the set of degenerate vacuum states—is disconnected, interfaces can form between regions settling into different vacuum sectors.
   Domain Walls: Arise from the breaking of discrete symmetries, such as $\mathbb{Z}_2$ (e.g., the Ising model) [2]. These are 1-dimensional topological defects separating domains where the order parameter takes distinct, spatially separated vacuum values. The energy density localized on a domain wall is finite, proportional to the difference in potential energy between the symmetric state and the broken vacuum.
   …