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Örs Legeza
Researcher at University of Marburg
Publications - 119
Citations - 4885
Örs Legeza is an academic researcher from University of Marburg. The author has contributed to research in topics: Density matrix renormalization group & Quantum entanglement. The author has an hindex of 34, co-authored 116 publications receiving 4174 citations. Previous affiliations of Örs Legeza include Hungarian Academy of Sciences & University of Erlangen-Nuremberg.
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Optimizing the density-matrix renormalization group method using quantum information entropy
Örs Legeza,Jenő Sólyom +1 more
TL;DR: In this article, an initialization procedure has been developed which maximizes the Kullback-Leibler entropy and extends the active space in a dynamical fashion, which reduces the effective system size during the first half-sweep and accelerates the speed of convergence of momentum space and quantum chemistry DMRG to a great extent.
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Controlling the accuracy of the density-matrix renormalization-group method: The dynamical block state selection approach
TL;DR: In this article, the authors applied the momentum space version of the density-matrix renormalization-group method (k-DMRG) in quantum chemistry in order to study the accuracy of the algorithm in this new context.
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Tensor product methods and entanglement optimization for ab initio quantum chemistry
Szilárd Szalay,Max Pfeffer,Valentin Murg,Gergely Barcza,Frank Verstraete,Reinhold Schneider,Örs Legeza +6 more
TL;DR: In this article, the authors present general techniques that can be used for the treatment of high-dimensional optimization tasks and time-dependent equations, and connect them to concepts already used in many-body quantum physics.
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Simulating strongly correlated quantum systems with tree tensor networks
TL;DR: In this article, Shi et al. presented a tree-tensor-network-based method to study strongly correlated systems with nonlocal interactions in higher dimensions, where the local sites can be coupled to more than two neighboring auxiliary subspaces.
Journal ArticleDOI
Tensor product methods and entanglement optimization for ab initio quantum chemistry
Szilárd Szalay,Max Pfeffer,Valentin Murg,Gergely Barcza,Frank Verstraete,Reinhold Schneider,Örs Legeza +6 more
TL;DR: A pedagogical introduction to the theoretical background of this novel field of entanglement and the underlying benefits through numerical applications on a text book example are demonstrated.