Zobrazeno 1 - 10
of 6 442
pro vyhledávání: '"Lovas, A"'
Autor:
Lovas, Attila
Nonlinear time series models with exogenous regressors are essential in econometrics, queuing theory, and machine learning, though their statistical analysis remains incomplete. Key results, such as the law of large numbers and the functional central
Externí odkaz:
http://arxiv.org/abs/2410.05056
We propose a variational approach to explore quasiparticle excitations in interacting quantum many-body systems, motivated by the potential in leveraging near-term noisy intermediate scale quantum devices for quantum state preparation. By exploiting
Externí odkaz:
http://arxiv.org/abs/2409.08545
Publikováno v:
Phys. Rev. B 109: 014308 (2024)
We study the non-equilibrium dynamics of the quantum sine-Gordon model describing a pair of Josephson-coupled one-dimensional bosonic quasi-condensates. Motivated by experimentally accessible quench procedures where the zero mode of the quasi-condens
Externí odkaz:
http://arxiv.org/abs/2309.03596
We construct the first complete exact numerical solution of a mean field quantum spin glass model, the transverse field Sherrington-Kirkpatrick model, by implementing a continuous-time quantum Monte Carlo method in the presence of full replica symmet
Externí odkaz:
http://arxiv.org/abs/2306.07337
Publikováno v:
Phys. Rev. B 108, 184417 (2023)
We present experimental and theoretical evidence of novel bound state formation in the low transverse field ordered phase of the quasi-one-dimensional Ising-like material CoNb$_2$O$_6$. High resolution single crystal inelastic neutron scattering meas
Externí odkaz:
http://arxiv.org/abs/2306.01948
We revisit processes generated by iterated random functions driven by a stationary and ergodic sequence. Such a process is called strongly stable if a random initialization exists, for which the process is stationary and ergodic, and for any other in
Externí odkaz:
http://arxiv.org/abs/2304.04657
We investigate phase transitions in the encoding of quantum information in a quantum many-body system due to the competing effects of unitary scrambling and boundary dissipation. Specifically, we study the fate of quantum information in a one-dimensi
Externí odkaz:
http://arxiv.org/abs/2304.02664
Autor:
Rongqing Chen, András Lovas, Péter Bakos, Tamás Molnár, Fatime Hawchar, Balázs Benyó, Zhanqi Zhao, J. Geoffrey Chase, Stefan J. Rupitsch, Knut Moeller
Publikováno v:
BMC Pulmonary Medicine, Vol 24, Iss 1, Pp 1-7 (2024)
Abstract Introduction The apnea test (AT) is a crucial procedure in determining brain death (BD), with detection of spontaneous breathing efforts serving as a key criterion. Numerous national statutes mandate complete disconnection of the patient fro
Externí odkaz:
https://doaj.org/article/cbd86a53efea4e3f866985e834c77a56
Publikováno v:
Phys. Rev. B 108, 224304 (2023)
We study measurement-induced symmetry-protected topological (SPT) order in a wide class of quantum random circuit models by combining calculations within the stabilizer formalism with tensor network simulations. We construct a family of quantum rando
Externí odkaz:
http://arxiv.org/abs/2302.14551
Autor:
Lovas, Attila, Rásonyi, Miklós
We study the mixing properties of an important optimization algorithm of machine learning: the stochastic gradient Langevin dynamics (SGLD) with a fixed step size. The data stream is not assumed to be independent hence the SGLD is not a Markov chain,
Externí odkaz:
http://arxiv.org/abs/2210.02092