Alessio Lerose (Author), Bojan Žunkovič (Author), Alessandro Silva (Author), Andrea Gambassi (Author)

Abstract

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. Utilizing 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 excitations during the accessible time scale: the excess energy density remains localized around the initial position of the domain-walls. This quasi-localization is accurately reproduced by an effective semiclassical model, which elucidates the crucial role that long-range interactions play in this phenomenon. The predictions of this work can be tested in current experiments with trapped ions.

Keywords

kvantna mehanika;kvantne spinske verige;quantum mechanics;quantum spin chains;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FMF - Faculty of Mathematics and Physics
UDC: 530.145
COBISS: 3301988 Link will open in a new window
ISSN: 2469-9950
Views: 773
Downloads: 537
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Other data

Secondary language: Slovenian
Secondary keywords: kvantna mehanika;kvantne spinske verige;
Pages: str. 121112-1-121112-6
Volume: ǂVol. ǂ99
Issue: ǂiss. ǂ12
Chronology: 2019
DOI: 10.1103/PhysRevB.99.121112
ID: 11114268