Search Results - "Nakerst, Goran"
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Chaos in the three-site Bose-Hubbard model -- classical vs quantum
Published 18-03-2022“…We consider a quantum many-body system - the Bose-Hubbard system on three sites - which has a classical limit, and which is neither strongly chaotic nor…”
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Structure of the Hamiltonian of mean force
Published 09-07-2024“…Phys. Rev. E 110, 014111 (2024) The Hamiltonian of mean force is an effective Hamiltonian that allows a quantum system, non-weakly coupled to an environment,…”
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The spectral boundary of the Asymmetric Simple Exclusion Process (ASEP) -- free fermions, Bethe ansatz and random matrix theory
Published 01-02-2024“…In non-equilibrium statistical mechanics, the Asymmetric Simple Exclusion Process (ASEP) serves as a paradigmatic example. We investigate the spectral…”
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Eigenstate thermalization scaling in approaching the classical limit
Published 11-12-2020“…Phys. Rev. E 103, 042109 (2021) According to the eigenstate thermalization hypothesis (ETH), the eigenstate-to-eigenstate fluctuations of expectation values of…”
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Random sparse generators of Markovian evolution and their spectral properties
Published 20-03-2023“…The evolution of a complex multi-state system is often interpreted as a continuous-time Markovian process. To model the relaxation dynamics of such systems, we…”
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Assigning Temperatures to Eigenstates
Published 01-02-2023“…In the study of thermalization in finite isolated quantum systems, an inescapable issue is the definition of temperature. We examine and compare different…”
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Gradient descent with momentum --- to accelerate or to super-accelerate?
Published 17-01-2020“…We consider gradient descent with `momentum', a widely used method for loss function minimization in machine learning. This method is often used with `Nesterov…”
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