306 citations · 961 across the 30 of their papers we have counts for
11 papers · 1 filter
Shuttling of parafermions in an electronic ladder model
Botond Osváth, Gergely Barcza, László Oroszlány
Parafermions with non-Abelian statistics have been proposed as a promising platform for quantum computation, potentially enabling a broader set of topologically protected gates tha…
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…
DMRG on top of plane-wave Kohn-Sham orbitals: case study of defected boron nitride
Gergely Barcza, Viktor Ivády, Tibor Szilvási +4
In this paper, we analyze the numerical aspects of the inherently multi-reference density matrix renormalization group (DMRG) calculations on top of the periodic Kohn-Sham density…
Symmetric single-impurity Kondo model on a tight-binding chain: a comparison of analytical and numerical ground-state approaches
Gergely Barcza, Kevin Bauerbach, Fabian Eickhoff +3
We analyze the ground-state energy, local spin correlation, impurity spin polarization, impurity-induced magnetization, and corresponding zero-field susceptibilities of the symmetr…
Ground-state properties of the symmetric single-impurity Anderson model on a ring from Density-Matrix Renormalization Group, Hartree-Fock, and Gutzwiller theory
Gergely Barcza, Florian Gebhard, Thorben Linneweber +1
We analyze the ground-state energy, magnetization, magnetic susceptibility, and Kondo screening cloud of the symmetric single-impurity Anderson model (SIAM) that is characterized b…
Optical phonons for Peierls chains with long-range Coulomb interactions
Máté Timár, Gergely Barcza, Florian Gebhard +1
We consider a chain of atoms that are bound together by a harmonic force. Spin-1/2 electrons that move between neighboring chain sites (Hückel model) induce a lattice dimerization…
Hückel--Hubbard-Ohno modeling of -bonds in ethene and ethyne with application to trans-polyacetylene
Máté Timár, Gergely Barcza, Florian Gebhard +2
Quantum chemistry calculations provide the potential energy between two carbon atoms in ethane (HCCH), ethene (HCCH), and ethyne (HCCH) as a function…
Dissecting the Bond Formation Process of -Metal-Ethene Complexes with Multireference Approaches
Yilin Zhao, Katharina Boguslawski, Paweł Tecmer +4
The bonding mechanism of ethene to a nickel or palladium center is studied by the density matrix renormalization group algorithm, the complete active space self consistent field me…
The density matrix renormalization group algorithm on kilo-processor architectures: implementation and trade-offs
Csaba Nemes, Gergely Barcza, Zoltán Nagy +2
In the numerical analysis of strongly correlated quantum lattice models one of the leading algorithms developed to balance the size of the effective Hilbert space and the accuracy…
Excited states in poly-diacetylene chains: A Density-matrix-renormalization-group study
Gergely Barcza, William Barford, Florian Gebhard +1
We study theoretically poly-diacetylene chains diluted in their monomer matrix. We employ the density-matrix renormalization group method (DMRG) on finite chains to calculate the g…
Density-matrix-renormalization-group study of excitons in poly-diacetylene chains
Gergely Barcza, Örs Legeza, Florian Gebhard +1
We study the elementary excitations of a model Hamiltonian for the -electrons in poly-diacetylene chains. In these materials, the bare band gap is only half the size of the obse…