HZB researchers find evidence of fractons in realistic quantum models

Researchers at Helmholtz-Zentrum Berlin (HZB), led by Johannes Reuther and Nils Niggemann, have provided new numerical evidence for the existence of fractons within a more realistic quantum solid-state model. Fractons are exotic quasiparticles characterized by extremely limited mobility; a single fracton cannot move independently and requires interactions with other fractons to shift.

Previously, theoretical predictions of fractons relied on highly generalized gauge field theories. This new research moves the concept closer to experimental reality by demonstrating that these particles can emerge in simulations of a realistic quantum solid, rather than just abstract mathematical models.

Fractons are predicted to appear in quantum spin liquids—states of matter in crystals where electron magnetic moments continue to fluctuate even at absolute zero. Because of their restricted movement, scientists suggest fractons could potentially be used to store quantum information more robustly.