Št. zadetkov: 20
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Oznake:
kvantna statistična mehanika;kvantna integrabilnost;kvantni transport;termodinamika;quantum statistical mechanics;quantum integrability;quantum transport;thermodynamics;
We study the low-temperature transport properties of out-of equilibrium XXZ spin-1/2 chains. We consider the protocol where two semiinfinite chains are prepared in two thermal states at small but different temperatures and suddenly joined together. We focus on the qualitative and quantitative featur ...
Leto:
2018
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
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Oznake:
neravnovesna statistična mehanika;kvantni kaos;nonequilibrium statistical mechanics;quantum chaos;
We study the scrambling of quantum information in local random unitary circuits by focusing on the tripartite information proposed by Hosur et al. We provide exact results for the averaged Rényi-2 tripartite information in two cases: (i) the local gates are Haar random and (ii) the local gates are d ...
Leto:
2020
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
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Oznake:
neravnovesna statistična mehanika;prepletenostna entropija;nonequilibrium statistical mechanics;entanglement entropy;
We investigate the crossover of the entanglement entropy toward its thermal value in nearly integrable systems. We employ equations-of-motion techniques to study the entanglement dynamics in a lattice model of weakly interacting spinless fermions after a quantum quench. For weak enough interactions ...
Leto:
2020
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
kvantna statistična mehanika;integrabilni sistemi;kvantna prepletenost;quantum statistical mechanics;integrable systems;quantum entanglement;
A typical working condition in the study of quantum quenches is that the initial state produces a distribution of quasiparticle excitations with an opposite-momentum-pair structure. In this work we investigate the dynamical and stationary properties of the entanglement entropy after a quench from in ...
Leto:
2018
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
kvantna mehanika;kvantni kaos;statistična fizika;quantum mechanics;quantum chaos;statistical physics;
The most general and versatile defining feature of quantum chaotic systems is that they possess an energy spectrum with correlations universally described by random matrix theory (RMT). This feature can be exhibited by systems with a well-defined classical limit as well as by systems with no classic ...
Leto:
2018
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
kvantna statistična mehanika;neravnovesni sistemi;večdelčni sistemi;kvantna prepletenost;quantum statistical mechanics;nonequilibrium systems;many-body systems;quantum entanglement;
The spreading of entanglement in out-of-equilibrium quantum systems is currently at the center of intense interdisciplinary research efforts involving communities with interests ranging from holography to quantum information. Here we provide a constructive and mathematically rigorous method to compu ...
Leto:
2019
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
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Oznake:
We investigate the dynamics of bipartite entanglement after the sudden junction of two leads in interacting integrable models. By combining the quasiparticle picture for the entanglement spreading with Generalised Hydrodynamics we derive an analytical prediction for the dynamics of the entanglement ...
Leto:
2019
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
kvantna statistična mehanika;quantum statistical mechanics;
We consider a class of quantum lattice models in 1 + 1 dimensions represented as local quantum circuits that enjoy a particular dual-unitarity property. In essence, this property ensures that both the evolution in time and that in space are given in terms of unitary transfer matrices. We show that f ...
Leto:
2019
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
statistična fizika;statistical physics;
The semiclassical approach introduced by Sachdev and collaborators proved to be extremely successful in the study of quantum quenches in massive field theories, both in homogeneous and inhomogeneous settings. While conceptually very simple, this method allows one to obtain analytic predictions for s ...
Leto:
2019
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
kvantna prepletenost;kvantni kaos;večdelčni sistemi;entanglement;quantum chaos;quantum many-body systems;
The entanglement in operator space is a well established measure for the complexity of the quantum many-body dynamics. In particular, that of local operators has recently been proposed as dynamical chaos indicator, i.e. as a quantity able to discriminate between quantum systems with integrable and c ...
Leto:
2020
Vir:
Fakulteta za matematiko in fiziko (UL FMF)