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Article Dans Une Revue Physical Review Letters Année : 2022

Global Quenches after Localized Perturbations

Résumé

We investigate the effect of a single spin flip preceding a global quench between translationally invariant local Hamiltonians in spin-1/2 chains. The effect of the localized perturbation does not fade away however large the distance from the perturbation is. In particular, translational invariance is not restored and the infinite-time limit depends on whether the spin was flipped or not. We argue that this phenomenon is more general than the particular example considered and we conjecture that it is triggered by topological properties, specifically, the existence of “semilocal charges.”
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Dates et versions

hal-03413343 , version 1 (08-04-2024)

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Maurizio Fagotti. Global Quenches after Localized Perturbations. Physical Review Letters, 2022, 128 (11), pp.110602. ⟨10.1103/PhysRevLett.128.110602⟩. ⟨hal-03413343⟩
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