Št. zadetkov: 36
Izvirni znanstveni članek
Oznake:
nelinearna dinamika;statistična fizika;kvantni kaos;nonlinear dynamics;statistical physics;quantum chaos;
We introduce a complex-plane generalization of the consecutive level-spacing ratio distribution used to distinguish regular from chaotic quantum spectra. Our approach features the distribution of complex-valued ratios between nearest- and next-to-nearest-neighbor spacings. We show that this quantity ...
Leto:
2020
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
odprti kvantni sistemi;kvantni kaos;open quantum systems;quantum chaos;
We study generic open quantum systems with Markovian dissipation, focusing on a class of stochastic Liouvillian operators of Lindblad form with independent random dissipation channels (jump operators) and a random Hamiltonian. We establish that the global spectral features, the spectral gap, and the ...
Leto:
2020
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
statistična fizika;kvantna mehanika;odprti kvantni sistemi;statistical physics;quantum mechanics;open quantum systems;
We explicitly construct an integrable and strongly interacting dissipative quantum circuit via a trotterization of the Hubbard model with imaginary interaction strength. To prove integrability, we build an inhomogeneous transfer matrix, from which conserved superoperator charges can be derived, in p ...
Leto:
2021
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
fizika kondenzirane snovi;močno korelirani sistemi;kvantni kaos;condensed matter physics;strongly-correlated systems;quantum chaos;
We propose the Sachdev-Ye-Kitaev Lindbladian as a paradigmatic solvable model of dissipative many-body
quantum chaos. It describes N strongly coupled Majorana fermions with random all-to-all interactions, with
unitary evolution given by a quartic Hamiltonian and the coupling to the environment des ...
Leto:
2022
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
fizika kondenzirane snovi;kvantna statistična mehanika;condensed matter physics;quantum statistical mechanics;
We perform a systematic symmetry classification of many-body Lindblad superoperators describing general (interacting) open quantum systems coupled to a Markovian environment. Our classification is based on the behavior of the many-body Lindbladian under antiunitary symmetries and unitary involutions ...
Leto:
2023
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
neravnovesna statistična mehanika;odprti kvantni sistemi;nonequilibrium statistical mechanics;open quantum systems;
The study of dissipation and decoherence in generic open quantum systems recently led to the investigation of spectral and steady-state properties of random Lindbladian dynamics. A natural question is then how realistic and universal those properties are. Here, we address these issues by considering ...
Leto:
2020
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
statistična mehanika;disipativni sistemi;ergodičnost;odprti kvantni sistemi;statistical mechanics;dissipative systems;ergidicity;open quantum systems;
We study spectral and steady-state properties of generic Markovian dissipative systems described by quadratic fermionic Liouvillian operators of the Lindblad form. The Hamiltonian dynamics is modeled by a generic random quadratic operator, i.e., as a featureless superconductor of class D, whereas th ...
Leto:
2023
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Ni določena
Oznake:
teorija rasti;ekonomski razvoj;ekonomski modeli;tehnološki razvoj;trajnostni razvoj;konvergenca;empirizem;cikli;ekonomske teorije;optimizacija;kapital;denarna teorija;keynesianizem;monetarna politika;neoklasiki;regulacija;naravni viri;matematični modeli;metodologija;okolje;ekonomska politika;ekonomsko raziskovanje;odprto gospodarstvo;ekonomsko ravnotežje;blaginja;učbeniki;Keynes;John Maynard;Angleški ekonomski teoretik;1883-1946;Keynesianizem;Denarna politika;Romer;Paul M.;Gospodarska rast;Ekonomski razvoj;Ramsey;F. P.;Matematične teorije;Statistične metode;Koopmans;Tjalling C.;Ekonomska znanost;Ekonomski modeli;Domar;E. D.;Narodni dohodek;Harrod;Roy F.;Ekonomska rast;Učbeniki za visoke šole;Ekonomske teorije;Modeli;Neoklasična ekonomija;Trajnostni razvoj;Kroženje;Teorija rasti produktov;Cikličnost gospodarstva;Denarne teorije;Implikacija;Strukturna transformacija;Modeli rasti;Koncepcije;Ravnovesje;Modernizem;Neoklasična ekonomska teorija;Ekonomija;Rast in razvoj;Naravni viri;Okoljski vidik;
Growth theory and sustainable development
Leto:
1999
Vir:
Ekonomsko-poslovna fakulteta (UM EPF)
Video in druga učna gradiva
Oznake:
computer science;machine learning
Stochastic variational inference allows for fast posterior inference in complex Bayesian models. However, the algorithm is prone to local optima which can make the quality of the posterior approximation sensitive to the choice of hyperparameters and initialization. We address this problem by replaci ...
Leto:
2015
Vir:
videolectures.net
Video in druga učna gradiva
Oznake:
computer science;machine learning
Probabilistic generative models can be used for compression, denoising, inpainting, texture synthesis, semi-supervised learning, unsupervised feature learning, and other tasks. Given this wide range of applications, it is not surprising that a lot of heterogeneity exists in the way these models are ...
Leto:
2016
Vir:
videolectures.net