54 citations · 102 across the 5 of their papers we have counts for
3 papers · 1 filter
Scaling of excitations in dimerized and frustrated spin-1/2 chains
D. Controzzi, C. Degli Esposti Boschi, F. Ortolani +1
We study the finite-size behavior of the low-lying excitations of spin-1/2 Heisenberg chains with dimerization and next-to-nearest neighbors interaction, J_2. The numerical analysi…
Investigation of Quantum Phase Transitions using Multi-target DMRG Methods
C. Degli Esposti Boschi, F. Ortolani
In this paper we examine how the predictions of conformal invariance can be widely exploited to overcome the difficulties of the density-matrix renormalization group near quantum c…
Low-Dimensional Spin Systems: Hidden Symmetries, Conformal Field Theories and Numerical Checks
C. Degli Esposti Boschi, E. Ercolessi, G. Morandi
We review here some general properties of antiferromagnetic Heisenberg spin chains, emphasizing and discussing the role of hidden symmetries in the classification of the various ph…