Extended Data Fig. 4: Dynamics of fractonic excitations (negative defect).
From: Observation of Hilbert space fragmentation and fractonic excitations in 2D
a Schematic of the spreading of the defect atom (filled red circle) to first order, which can move by forming doublons (dark red shaded area). The defect hole (dashed circle) can also move, facilitated by the defect atom (light red shaded area). b Anisotropic spreading of the defect analyzed in analogy to Fig. 4. c Sums over the reference-subtracted occupations, analyzed and compared to theory (red solid lines) in analogy to Fig. 4. Compared with the positive defect, the negative defect exhibits symmetric propagation on the sub-dimensional manifold. All error bars denote the s.e.m.
