Št. zadetkov: 10
Izvirni znanstveni članek
Oznake:
fizika kondenzirane snovi;kvantna mehanika;večdelčne lokalizacije;transport;kvaziperiodični sistemi;condensed matter physics;quantum mechanics;many-body localization;quasiperiodic systems;
Integrable models form pillars of theoretical physics because they allow for full analytical understanding. Despite being rare, many realistic systems can be described by models that are close to integrable. Therefore, an important question is how small perturbations influence the behavior of solvab ...
Leto:
2018
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Doktorska disertacija
Oznake:
transport;spinske verige;integrabilnost;nered;balistični transport;superdifuzija;difuzija;kvaziperiodičnost;Floquet;Drudejeva utež;defekt;
In this thesis we present research on one-dimensional quantum systems performed using a combination of numerical and analytic techniques, with a particular focus on spin transport. We first review the numeric and analytic methods used in our works and present some of the useful tricks we have employ ...
Leto:
2020
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
kvantna mehanika;integrabilni sistemi;spinska difuzija;quantum mechanics;integrable systems;spin diffusion;
Generalized hydrodynamics predicts universal ballistic transport in integrable lattice systems when prepared in generic inhomogeneous initial states. However, the ballistic contribution to transport can vanish in systems with additional discrete symmetries. Here we perform large scale numerical simu ...
Leto:
2017
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Magistrsko delo
Oznake:
kvantna mehanika;spinske verige;Heisenbergov model;neravnovesni transportni pojavi;matrično produktni nastavki;
Neravnovesni spinski transport v anizotropni Heisenbergovi spinski verigi
Leto:
2016
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
kvantna statistična mehanika;quantum statistical mechanics;
Equilibrium spatiotemporal correlation functions are central to understanding weak nonequilibrium physics. In certain local one-dimensional classical systems with three conservation laws they show universal features. Namely, fluctuations around ballistically propagating sound modes can be described ...
Leto:
2019
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
kvantna mehanika;spinski modeli;kvantni transport;Heisenbergove verige;difuzija;quantum mechanics;spin models;quantum transport;Heisenberg chains;diffusion;
The spin transport in isotropic Heisenberg model in the sector with zero magnetization is generically super- diffusive. Despite that, we here demonstrate that for a specific set of domain-wall-like initial product states it can instead be diffusive. We theoretically explain the time evolution of suc ...
Leto:
2017
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
statistična fizika;močno korelirani sistemi;kvantna mehanika;kvantna statistična mehanika;statistical physics;strongly correlated systems;quantum mechanics;quantum statistical mechanics;
A key goal of quantum chaos is to establish a relationship between widely observed universal spectral fluctuations of clean quantum systems and random matrix theory (RMT). Most prominent features of such RMT behavior with respect to a random spectrum, both encompassed in the spectral pair correlatio ...
Leto:
2018
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
kvantna mehanika;kvantni transport;neravnovesna statistična fizika;quantum mechanics;quantum transport;nonequilibrium statistical physics;localized defects;free fermions;quantum quenches;
We study quantum transport after an inhomogeneous quantum quench in a free fermion lattice system in the presence of a localised defect. Using a new rigorous analytical approach for the calculation of large time and distance asymptotics of physical observables, we derive the exact profiles of partic ...
Leto:
2019
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
kvantna mehanika;kvantna statistična mehanika;neravnovesna statistična fizika;balistični transport;spinske verige;quantum mechanics;quantum statistical mechanics;nonequilibrium statistical physics;ballistic transport;spin chains;
We demonstrate ballistic spin transport of an integrable unitary quantum circuit, which can be understood either as a paradigm of an integrable periodically driven (Floquet) spin chain, or as a Trotterized anisotropic (XXZ) Heisenberg spin-1/2 model. We construct an analytic family of quasi-local co ...
Leto:
2019
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
neravnovesna statistična mehanika;kvantna mehanika;večdelčni sistemi;nonequilibrium statistical mechanics;quantum mechanics;many-body systems;
Introducing a class of SU(2) invariant quantum unitary circuits generating chiral transport, we examine the role of broken space-reflection and time-reversal symmetries on spin-transport properties. Upon adjusting parameters of local unitary gates, the dynamics can be either chaotic or integrable. T ...
Leto:
2024
Vir:
Fakulteta za matematiko in fiziko (UL FMF)