Quasilocalized excitations induced by long-range interactions in translationally invariant quantum spin chains
| Autor: | Bojan Žunkovič, Alessandro Silva, Andrea Gambassi, Alessio Lerose |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
FOS: Physical sciences
Semiclassical physics Non-equilibrium thermodynamics 02 engineering and technology 01 natural sciences Settore FIS/03 - Fisica della Materia Ion Quantum spin chains 0103 physical sciences Many-body localization Propagation 010306 general physics Quantum Condensed Matter - Statistical Mechanics Physics Statistical Mechanics (cond-mat.stat-mech) Condensed matter physics Invariant (physics) 021001 nanoscience & nanotechnology Settore FIS/02 - Fisica Teorica Modelli e Metodi Matematici 3. Good health Ferromagnetism Quantum Gases (cond-mat.quant-gas) Transition Ising model Condensed Matter - Quantum Gases 0210 nano-technology |
| Zdroj: | Physical Review B |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.99.121112 |
| Popis: | We show that long-range ferromagnetic interactions in quantum spin chains can induce spatial quasi-localization of topological magnetic defects, i.e., domain-walls, even in the absence of quenched disorder. By means of matrix-product-states numerical techniques, we study the non-equilibrium evolution of initial states with one or more domain-walls under the effect of a transverse field in variable-range quantum Ising chains. Upon increasing the range of these interactions, we demonstrate the occurrence of a sharp transition characterized by the suppression of spatial diffusion of the magnetic defects during the accessible time scale: the excess energy density remains localized around the initial domain-wall positions, hindering thermalization. This quasi-localization is accurately reproduced by an effective semiclassical model, which elucidates the crucial role that long-range interactions play in this phenomenon. These predictions can be tested in current experiments with trapped ions. 6 pages, 3 figures |
| Databáze: | OpenAIRE |
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