Macroscopic effects of localised measurements in jammed states of quantum spin chains

Understand

A quantum jammed state can be seen as a state where the phase space available to particles shrinks to zero, an interpretation quite accurate in integrable systems, where stable quasiparticles scatter elastically.

• We consider the integrable dual folded XXZ model, which is equivalent to the XXZ model in the limit of large anisotropy.
• We perform a jamming-breaking localised measurement in a jammed state.
• We find that jamming is locally restored, but local observables exhibit nontrivial time evolution on macroscopic, ballistic scales, without ever relaxing back to their initial values.