264 citations · 2.6k across the 71 of their papers we have counts for
72 papers
Diversifying time evolution of matrix product states using BUGs
Kornél Kapás, Dominik Sulz, Charlotte Verhoeven +3
Time evolution of tensor-network states is a central tool for studying nonequilibrium dynamics in strongly correlated quantum systems. In the past decade, using the time-dependent…
Block entropy area based non-local fermionic mode optimization with gradient disentanglers
Miklós Antal Werner, Gero Friesecke, Andor Menczer +2
We introduce a systematic block entropy area based mode optimization algorithm for many-body quantum states of interacting fermions represented by matrix product states. From the g…
Parallel implementation of the Density Matrix Renormalization Group method achieving a quarter petaFLOPS performance on a single DGX-H100 GPU node
Andor Menczer, Maarten van Damme, Alan Rask +5
We report cutting edge performance results for a hybrid CPU-multi GPU implementation of the spin adapted ab initio Density Matrix Renormalization Group (DMRG) method on current sta…
Global fermionic mode optimization via swap gates
Gero Friesecke, Miklós Antal Werner, Kornél Kapás +2
An optimal choice of single-particle modes leads to an optimal tensor network-based compression of the many-body wave function for systems of indistinguishable particles, which com…
DMRG-tailored coupled cluster method in the 4c-relativistic domain: General implementation and application to the NUHFI and NUF molecules
Jakub Višňák, Jan Brandejs, Mihály Máté +3
Heavy atom compounds represent a challenge for computational chemistry, due to the need for simultaneous treatment of relativistic and correlation effects. Often such systems exhib…
Loss-induced quantum information jet in an infinite temperature Hubbard chain
Patrik Penc, Cătălin Paşcu Moca, Örs Legeza +3
Information propagation in the one-dimensional infinite temperature Hubbard model with a dissipative particle sink at the end of a semi-infinite chain is studied. In the strongly i…
Spectroscopy of N=50 isotones with the valence-space density matrix renormalization group
A. Tichai, K. Kapás, T. Miyagi +4
The recently proposed combination of the valence-space in-medium similarity renormalization group (VS-IMSRG) with the density matrix renormalization group (DMRG) offers a scalable…
Two dimensional quantum lattice models via mode optimized hybrid CPU-GPU density matrix renormalization group method
Andor Menczer, Kornél Kapás, Miklós Antal Werner +1
We present a hybrid numerical approach to simulate quantum many body problems on two spatial dimensional quantum lattice models via the non-Abelian ab initio version of the density…
A simple electronic ladder model harboring parafermions
Botond Osváth, Gergely Barcza, Örs Legeza +2
Parafermions are anyons with the potential for realizing non-local qubits that are resilient to local perturbations. Compared to Majorana zero modes, braiding of parafermions imple…
Generic Mott-Hubbard phase diagram for extended Hubbard models without Umklapp scattering
Florian Gebhard, Kevin Bauerbach, Örs Legeza
We determine the ground-state phase diagram for the 1/r-Hubbard model with repulsive nearest-neighbor interaction at half band-filling using the density-matrix renormalization grou…
Collective tunneling of a Wigner necklace in carbon nanotubes
Dominik Szombathy, Miklós Antal Werner, Cătălin Paşcu Moca +4
The collective tunneling of a Wigner necklace - a crystal-like state of a small number of strongly interacting electrons confined to a suspended nanotube and subject to a double we…
Massively Parallel Tensor Network State Algorithms on Hybrid CPU-GPU Based Architectures
Andor Menczer, Örs Legeza
The interplay of quantum and classical simulation and the delicate divide between them is in the focus of massively parallelized tensor network state (TNS) algorithms designed for…
Hilbert space multireference coupled clusters tailored by matrix product states
Ondrej Demel, Jan Brandejs, Jakub Lang +4
The DMRG method, despite its favorable scaling, it is in practice not suitable for computations of dynamic correlation. Several approaches to include that in post-DMRG methods exis…
Symmetric carbon tetramers forming chemically stable spin qubits in hBN
Zsolt Benedek, Rohit Babar, Ádám Ganyecz +4
Point defect quantum bits in semiconductors have the potential to revolutionize sensing at atomic scales. Currently, vacancy related defects, such as the NV center in diamond and t…
Predicting the FCI energy of large systems to chemical accuracy from restricted active space density matrix renormalization group calculations
Gero Friesecke, Gergely Barcza, Örs Legeza
We theoretically derive and validate with large scale simulations a remarkably accurate power law scaling of errors for the restricted active space density matrix renormalization g…
Accurate localization of Kosterlitz-Thouless-type quantum phase transitions for one-dimensional spinless fermions
Florian Gebhard, Kevin Bauerbach, Örs Legeza
We investigate the charge-density wave (CDW) transition for one-dimensional spinless fermions at half band-filling with nearest-neighbor electron transfer amplitude and interac…
Spectroscopic evidence for engineered hadron formation in repulsive fermionic Hubbard Models
Miklós Antal Werner, Cătălin Paşcu Moca, Márton Kormos +3
Particle formation represents a central theme in various branches of physics, often associated to confinement. Here we show that dynamical hadron formation can be spectroscopically…
Combining the in-medium similarity renormalization group with the density matrix renormalization group: Shell structure and information entropy
A. Tichai, S. Knecht, A. T. Kruppa +5
We propose a novel many-body framework combining the density matrix renormalization group (DMRG) with the valence-space (VS) formulation of the in-medium similarity renormalization…
Entanglement and seniority
J. Kovács, A. T. Kruppa, P. Salamon +2
We study mode-entanglement in the seniority model, derive analytic formulas for the one-body reduced density matrix of states with seniority , and , and also det…
Simulating Lindbladian evolution with non-abelian symmetries: Ballistic front propagation in the Hubbard model with a localized loss
Cătălin Paşcu Moca, Miklós Antal Werner, Örs Legeza +3
We develop a non-Abelian time evolving block decimation (NA-TEBD) approach to study of open systems governed by Lindbladian time evolution, while exploiting an arbitrary number of…
Exact matrix product state representation and convergence of a fully correlated electronic wavefunction in the infinite basis limit
Gero Friesecke, Benedikt R. Graswald, Örs Legeza
In this article we present the exact representation of a fully correlated electronic wavefunction as the single-particle basis approaches completeness. It consists of a half-infini…
Towards large-scale restricted active space calculations inspired by the Schmidt decomposition
Gergely Barcza, Miklós Antal Werner, Gergely Zaránd +4
We present an alternative, memory-efficient, Schmidt decomposition-based description of the inherently bipartite restricted active space (RAS) scheme, which can be implemented effo…
Tracing the Mott-Hubbard transition in one-dimensional Hubbard models without Umklapp scattering
Florian Gebhard, Örs Legeza
We apply the density-matrix renormalization group (DMRG) method to a one-dimensional Hubbard model that lacks Umklapp scattering and thus provides an ideal case to study the Mott-H…
Fermionic systems for quantum information people
Szilárd Szalay, Zoltán Zimborás, Mihály Máté +3
The operator algebra of fermionic modes is isomorphic to that of qubits, the difference between them is twofold: the embedding of subalgebras corresponding to mode subsets and mult…