• Rapid Communication

Quasilocalized excitations induced by long-range interactions in translationally invariant quantum spin chains

Alessio Lerose, Bojan Žunkovič, Alessandro Silva, and Andrea Gambassi
Phys. Rev. B 99, 121112(R) – Published 25 March 2019

Abstract

We show that long-range ferromagnetic interactions in quantum spin chains can induce spatial quasilocalization of topological magnetic defects, i.e., domain walls, even in the absence of quenched disorder. Utilizing matrix-product-states numerical techniques, we study the nonequilibrium 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 quasilocalization 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 Rapid Communication can be tested in current experiments with trapped ions.

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  • Received 14 January 2019

DOI:https://doi.org/10.1103/PhysRevB.99.121112

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsStatistical Physics & Thermodynamics

Authors & Affiliations

Alessio Lerose1,2, Bojan Žunkovič3, Alessandro Silva1, and Andrea Gambassi1,2

  • 1SISSA—International School for Advanced Studies, via Bonomea 265, I-34136 Trieste, Italy
  • 2INFN—Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34136 Trieste, Italy
  • 3Department of Physics, Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia

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Issue

Vol. 99, Iss. 12 — 15 March 2019

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