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Št. zadetkov: 5
Dinamične lastnosti neravnovesnega 2D kvantnega Isingovega modela
Ivan Kukuljan, Tomaž Prosen
Magistrsko delo
Oznake: neravnovesna kvantna dinamika;ergodičnost;kaotičnost;neravnovesni 2D Isingov model;gostota kvazienergijskega spektra;Kotne prehodne matrike;renormalizabilnost;termodinamska limita;unitaren časovni razvoj;
Dinamične lastnosti neravnovesnega 2D kvantnega Isingovega modela
Leto: 2015 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Correlation functions of the quantum sine-Gordon model in and out of equilibrium
Ivan Kukuljan, Spyros Sotiriadis, G. Takacs
Izvirni znanstveni članek
Oznake: statistična mehanika;kvantna mehanika;kvantna teorija polja;integrabilni modeli;statistical mechanics;quantum mechanics;quantum field theory;integrable models;
Complete information on the equilibrium behavior and dynamics of quantum field theory (QFT) is provided by multipoint correlation functions. However, their theoretical calculation is a challenging problem, even for exactly solvable models. This has recently become an experimentally relevant problem, ...
Leto: 2018 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Nonequilibrium dynamics of quantum many-body systems: from lattice to quantum field theories
Ivan Kukuljan, Tomaž Prosen, G. Takacs
Doktorska disertacija
Oznake: nonequilibrium quantum physics;many-body systems;quantum lattice systems;quantum field theory;quantum chaos;ultra-cold atoms in the atom chip;out-of-time-ordered correlations;kicked quantum Ising model;quantum sine-Gordon model;
This doctoral thesis is in the field of nonequilibrium quantum physics. Using nonperturbative methods for the computation of the dynamics of many body quantum systems, both systems on lattices and quantum field theories, we address several open questions. We study the applicability in lattice system ...
Leto: 2019 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Out-of-horizon correlations following a quench in a relativistic quantum field theory
Ivan Kukuljan, Spyros Sotiriadis, G. Takacs
Izvirni znanstveni članek
Oznake: kvantna teorija polja;quantum field theory;
One of the manifestations of relativistic invariance in non-equilibrium quantum field theory is the “horizon effect” a.k.a. light-cone spreading of correlations: starting from an initially short-range correlated state, measurements of two observers at distant space-time points are expected to remain ...
Leto: 2020 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Weak quantum chaos
Ivan Kukuljan, Sašo Grozdanov, Tomaž Prosen
Izvirni znanstveni članek
Oznake: kvantna mehanika;teorija kaosa;quantum mechanics;quantum chaos;
Out-of-time-ordered correlation functions (OTOCs) are presently being extensively debated as quantifiers of dynamical chaos in interacting quantum many-body systems. We argue that in quantum spin and fermionic systems, where all local operators are bounded, an OTOC of local observables is bounded as ...
Leto: 2017 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Št. zadetkov: 5
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