Št. zadetkov: 11
Izvirni znanstveni članek
Oznake:
kvantna mehanika;ohranitveni zakoni;integrabilni sistemi;quantum mechanics;conservation laws;integrable systems;
The extensivity of the quantum Hirota model's conservation laws on a 1 + 1 dimensional lattice is considered. This model can be interpreted in terms of an integrable many-body quantum Floquet dynamics. We establish the procedure to generate a continuous family of quasilocal conservation laws from th ...
Leto:
2017
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Magistrsko delo
Oznake:
kvantna mehanika;kvantne grupe;kvantna integrabilnost;Heisenbergov model;Mazur-Suzukijeva neenakost;
Policiklične upodobitve kvantne grupe in kvazilokalne ohranjene količine
Leto:
2015
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Doktorska disertacija
Oznake:
quantum statistical mechanics;quantum integrability;cellular automata;open quantum systems;Trotterisation of the Heisenberg magnet;quantum Hirota model;quasilocal charges;Drude weight;Mazur bound;inhomogeneous Lax operators;
We present two directions of research in statistical mechanics of nonequilibrium onedimensional quantum systems. One is related to isolated integrable models, the other one to exactly solvable dissipatively driven spin chains. The device enabling their analysis is identified as the quantum group sym ...
Leto:
2019
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
kvantna mehanika;quantum mechanics;
We discuss a general procedure to construct an integrable real–time trotterization of interacting lattice models. As an illustrative example we consider a spin-1/2 chain, with continuous time dynamics described by the isotropic (XXX) Heisenberg Hamiltonian. For periodic boundary conditions local con ...
Leto:
2018
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:
statistična fizika;neravnovesna statistična mehanika;odprti kvantni sistemi;statistical physics;nonequilibrium statistical mechanics;open quantum systems;
We investigate a dissipatively driven XYZ spin-1/2 chain in the Zeno limit of strong dissipation, described by Lindblad master equation. The nonequilibrium steady state is expressed in terms of a matrix product ansatz using novel site-dependent Lax operators. The components of Lax operators satisfy ...
Leto:
2020
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
statistična fizika;odprti kvantni sistemi;kvantne spinske verige;statistical physics;open quantum systems;quantum spin chains;
We find novel site-dependent Lax operators in terms of which we demonstrate exact solvability of a dissipatively driven XYZ spin-1/2 chain in the Zeno limit of strong dissipation, with jump operators polarizing the boundary spins in arbitrary directions. We write the corresponding nonequilibrium ste ...
Leto:
2020
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
Dynamical response functions are standard tools for probing local physics near the equilibrium. They provide information about relaxation properties after the equilibrium state is weakly perturbed. In this paper we focus on systems which break the assumption of thermalization by exhibiting persisten ...
Leto:
2020
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
statistična fizika;neravnovesna statistična mehanika;statistical physics;nonequilibrium statistical mechanics;
We consider nonequilibrium time evolution in quantum spin chains after a global quench. Usually a nonequilibrium quantum many-body system locally relaxes to a (generalized) Gibbs ensemble built from conserved operators with quasilocal densities. Here we exhibit explicit examples of local Hamiltonian ...
Leto:
2024
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)