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

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

Povzetek

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.

Ključne besede

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

Podatki

Jezik:	Angleški jezik
Leto izida:	2019
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UL FMF - Fakulteta za matematiko in fiziko
UDK:	530.145
COBISS:	3301988
ISSN:	2469-9950
Št. ogledov:	773
Št. prenosov:	537
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	kvantna mehanika;kvantne spinske verige;
Strani:	str. 121112-1-121112-6
Letnik:	ǂVol. ǂ99
Zvezek:	ǂiss. ǂ12
Čas izdaje:	2019
DOI:	10.1103/PhysRevB.99.121112
ID:	11114268