Superdiffusive magnetization transport in the XX spin chain with nonlocal dephasing

Povzetek

We study a recently discussed XX spin chain with nonlocal dephasing [Y.-P. Wang etal., arXiv:2310.03069] in a steady-state boundary-driven setting, confirming superdiffusive magnetization transport in the thermodynamic limit. The emergence of superdiffusion is rather interesting as the Lindblad operators causing it are a coherent sum of two terms, each of which would separately cause diffusion. One therefore has a quantum phenomenon where a coherent sum of two diffusive terms results in superdiffusion. We also study perturbations of the superdiffusive model, finding that breaking the exact form of dissipators, as well as adding interactions to the XXchain, results in superdiffusion changing into diffusion.

Ključne besede

fizika kondenzirane snovi;statistična fizika;kvantne spinske verige;neravnovesni sistemi;condensed matter physics;statistical physics;quantum spin chains;nonequilibrium systems;

Podatki

Jezik:	Angleški jezik
Leto izida:	2024
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UL FMF - Fakulteta za matematiko in fiziko
UDK:	538.9
COBISS:	188677379
ISSN:	2469-9950
Št. ogledov:	19
Št. prenosov:	3
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	fizika kondenzirane snovi;statistična fizika;kvantne spinske verige;neravnovesni sistemi;
Vrsta dela (COBISS):	Članek v reviji
Strani:	str. 075105-1-075105-9
Letnik:	ǂVol. ǂ109
Zvezek:	ǂiss. ǂ7
Čas izdaje:	2024
DOI:	10.1103/PhysRevB.109.075105
ID:	23171167