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Quasilocalized excitations induced by long-range interactions in translationally invariant quantum spin chains
ID Lerose, Alessio (Author), ID Žunkovič, Bojan (Author), ID Silva, Alessandro (Author), ID Gambassi, Andrea (Author)

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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.

Language:English
Keywords:quantum mechanics, quantum spin chains
Typology:1.01 - Original Scientific Article
Organization:FMF - Faculty of Mathematics and Physics
Publication status:Published
Publication version:Author Accepted Manuscript
Year:2019
Number of pages:Str. 121112-1-121112-6
Numbering:Vol. 99, iss. 12
PID:20.500.12556/RUL-107468 This link opens in a new window
UDC:530.145
ISSN on article:2469-9950
DOI:10.1103/PhysRevB.99.121112 This link opens in a new window
COBISS.SI-ID:3301988 This link opens in a new window
Publication date in RUL:17.04.2019
Views:1822
Downloads:814
Metadata:XML DC-XML DC-RDF
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LEROSE, Alessio, ŽUNKOVIČ, Bojan, SILVA, Alessandro and GAMBASSI, Andrea, 2019, Quasilocalized excitations induced by long-range interactions in translationally invariant quantum spin chains. Physical review [online]. 2019. Vol. 99, no. 12, p. 121112-1-121112–6. [Accessed 15 April 2025]. DOI 10.1103/PhysRevB.99.121112. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=107468
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Record is a part of a journal

Title:Physical review
Publisher:American Physical Society
ISSN:2469-9950
COBISS.SI-ID:2997348 This link opens in a new window

Secondary language

Language:Slovenian
Keywords:kvantna mehanika, kvantne spinske verige

Projects

Funder:EC - European Commission
Funding programme:H2020
Project number:694544
Name:Open many-body non-equilibrium systems
Acronym:OMNES

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