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

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

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.

• Jezik: Angleški jezik
• Ključne besede: quantum mechanics, quantum spin chains
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Recenzirani rokopis
• Leto izida: 2019
• Št. strani: Str. 121112-1-121112-6
• Številčenje: Vol. 99, iss. 12
• PID: 20.500.12556/RUL-107468
• UDK: 530.145
• ISSN pri članku: 2469-9950
• DOI: 10.1103/PhysRevB.99.121112
• COBISS.SI-ID: 3301988
• Datum objave v RUL: 17.04.2019

Gradivo je del revije

• Naslov: Physical review
• Založnik: American Physical Society
• ISSN: 2469-9950
• COBISS.SI-ID: 2997348

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: kvantna mehanika, kvantne spinske verige

Projekti

• Financer: EC - European Commission
• Program financ.: H2020
• Številka projekta: 694544
• Naslov: Open many-body non-equilibrium systems
• Akronim: OMNES