Št. zadetkov: 16
Izvirni znanstveni članek
Oznake:
kvantna mehanika;kvantna statistična mehanika;korelacijske funkcije;quantum mechanics;quantum statistical mechanics;correlation functions;
We formulate and discuss the explicit computation of dynamic correlation functions in open quadratic fermionic systems which are driven and dissipated by Lindblad jump processes that are linear in canonical fermionic operators. Dynamic correlators are interpreted in terms of a local quantum quench w ...
Leto:
2017
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Doktorska disertacija
Oznake:
quantum chaos;quantum many-body systems;exact solutions;non-equilibrium statistical mechanics;Floquet systems;quantum circuits;spectral form factor;kicked Ising spin chains;
Chaotic quantum many-body systems exhibit complex dynamics, which presents an obstacle in their analytical and numerical understanding. Therefore, many aspects of these generic many-body systems are still poorly understood.
In this thesis, we present exact solutions for chaotic many-body quantum ...
Leto:
2021
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 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)
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:
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)
Izvirni znanstveni članek
Oznake:
kvantna prepletenost;kubiti;večdelčni sistemi;entanglement;qubits;quantum many-body systems;
We provide exact results for the dynamics of local-operator entanglement in quantum circuits with two-dimensional wires featuring ultralocal solitons, i.e. single-site operators which, up to a phase, are simply shifted by the time evolution. We classify all circuits, allowing for ultralocal solitons ...
Leto:
2020
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
kvantna fizika;statistična fizika;quantum physics;statistical physics;
Interacting many-body systems with explicitly accessible spatiotemporal correlation functions are extremely rare, especially in the absence of Bethe-ansatz or Yang-Baxter integrability. Recently, we identified a remarkable class of such systems and termed them dual-unitary quantum circuits. These ar ...
Leto:
2021
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
statistična fizika;nelinearna dinamika;kvantna mehanika;kvantni kaos;statistical physics;nonlinear dynamics;quantum mechanics;quantum chaos;
We study the time-evolution operator in a family of local quantum circuits with random fields in a fixed direction. We argue that the presence of quantum chaos implies that at large times the time-evolution operator becomes effectively a random matrix in the many-body Hilbert space. To quantify this ...
Leto:
2021
Vir:
Fakulteta za matematiko in fiziko (UL FMF)