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Macroscopic Effects of Localized Measurements in Jammed States of Quantum Spin Chains
Kemal Bidzhiev1, Maurizio Fagotti1, Lenart Zadnik1
1Université Paris-Saclay, CNRS, LPTMS, 91405 Orsay, France.
Abstract:
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 localized 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.
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