Fracton (subdimensional particle)

Fractons are a novel type of emergent particle that arise in certain condensed matter systems, particularly in the context of topological phases of matter. Unlike conventional particles, which can move freely in space, fractons have restricted mobility; they cannot move independently but can only move when certain conditions are met, often involving the movement of other fractons. Key features of fractons include: 1. **Subdimensional Motion**: Fractons can exhibit restricted types of motion depending on their configuration.