169 citations · 265 across the 5 of their papers we have counts for
5 papers
The Role of the Exchange Interaction in the One-Dimensional -Component Hubbard Model
E. Szirmai, Ö. Legeza, J. Sólyom
The commensurate -filled -component Hubbard chain was investigated by bosonization and high-precision density-matrix renormalization-group analysis. It was found that depen…
Unified phase diagram of models exhibiting neutral-ionic transition
Ö. Legeza, K. Buchta, J. Sólyom
We have studied the neutral-ionic transition in organic mixed-stack compounds. A unified model has been derived which, in limiting cases, is equivalent to the models proposed earli…
Probable absence of a quadrupolar spin-nematic phase in the bilinear-biquadratic spin-1 chain
K. Buchta, G. Fáth, Ö. Legeza +1
We study numerically the ground-state phase diagram of the bilinear-biquadratic spin-1 chain near the ferromagnetic instability point, where the existence of a gapped or gapless no…
Quantum data compression, quantum information generation, and the density-matrix renormalization group method
Ö. Legeza, J. Sólyom
We have studied quantum data compression for finite quantum systems where the site density matrices are not independent, i.e., the density matrix cannot be given as direct product…
Optimizing momentum space DMRG using quantum information entropy
Ö. Legeza, J. Sólyom
In order to optimize the ordering of the lattice sites in the momentum space and quantum chemistry versions of the density matrix renormalization group (DMRG) method we have studie…