F. Ortolani
University of Bologna
25 Papers
89 Citations
F. Ortolani is an academic researcher from University of Bologna. The author has contributed to research in topics: Density matrix renormalization group & Hubbard model. The author has an hindex of 14, co-authored 25 publications.
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Papers
Superconductivity near phase separation in models of correlated electrons
Elbio Dagotto,Jose Riera,Jose Riera,Yi Chen,Adriana Moreo,Alexander Nazarenko,Francisco C. Alcaraz,F. Ortolani +7 more
TL;DR: In this paper, the two-dimensional t-J model superconducts near phase separation in the regime of quarter-filling density, in agreement with previous results reported by Dagotto and Riera [Phys Rev Lett 70, 682 (1993).
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The density matrix renormalization group method. Application to the PPP model of a cyclic polyene chain.
G. Fano,F. Ortolani,L. Ziosi +2 more
TL;DR: The density matrix renormalization group (DMRG) method introduced by White for the study of strongly interacting electron systems is reviewed; the method is variational and considers a system of localized electrons as the union of two adjacent fragments A,B as mentioned in this paper.
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The density matrix renormalization group method. Application to the PPP model of a cyclic polyene chain
G. Fano,F. Ortolani,L. Ziosi +2 more
TL;DR: The density matrix renormalization group (DMRG) method introduced by White for the study of strongly interacting electron systems is reviewed in this paper, where a density matrix rho is introduced, whose eigenvectors corresponding to the largest eigenvalues are the most significant, the most probable states of A in the presence of B; these states are retained, while states corresponding to small eigen values of rho are neglected.
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Single-site entanglement at the superconductor-insulator transition in the Hirsch model
TL;DR: In this paper, the authors investigated the transition to the insulating state in the one-dimensional Hubbard model with bond-charge interaction x (Hirsch model), at half-filling and T = 0.5.
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Renyi entanglement entropies of descendant states in critical systems with boundaries: conformal field theory and spin chains
TL;DR: In this paper, the Renyi entanglement entropies of descendant states in critical one-dimensional systems with boundaries are discussed, which map to boundary conformal field theories in the scaling limit.
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