The way a piece of metal bends is controlled by the same deep, cosmic laws that handle gravity and light.
arXiv · March 18, 2026 · 2603.16619
The Takeaway
Permanent bending (plasticity) is usually seen as a messy, random process involving friction. This new framework proves that the movement of defects in a solid follows 'gauge theory'—the same high-level mathematical rules that dictate the behavior of the fundamental forces of the universe.
From the abstract
Plastic deformation is widely regarded as an intrinsically dissipative phenomenon and its theoretical description is largely phenomenological. We argue instead that plasticity possesses a non-dissipative, symmetry determined backbone: defect kinematics are fixed by symmetry prior to dissipation and separate from constitutive assumptions. Starting from the spontaneous breaking of spacetime symmetries in a crystalline phase, we construct an effective field theory in which elasticity and geometry r