12 citations · 20 across the 2 of their papers we have counts for
3 papers
cond-mat.dis-nn2008★ 8 cited
Non-equilibrium structures and slow dynamics in a two dimensional spin system with competitive long range and short range interactions
Omar Osenda, Francisco A. Tamarit, Sergio A. Cannas
We introduce a lattice spin model that mimics a system of interacting particle through a short range repulsive potential and a long range attractive power law decaying potential. W…
quant-ph2007★ 12 cited
Two-spin subsystem entanglement in spin 1/2 rings with long range interactions
M. Gaudiano, O. Osenda, G. A. Raggio
We consider the two-spin subsystem entanglement for eigenstates of the Hamiltonian \[ H= \sum_{1\leq j< k \leq N} (\frac{1}{r_{j,k}})^α {\mathbf σ}_j\cdot {\mathbf σ}_k \] for a ri…
quant-ph2005
Entanglement in thermal equilibrium states
O. Osenda, G. A. Raggio
We revisist the issue of entanglement of thermal equilibrium states in composite quantum systems. The possible scenarios are exemplified in bipartite qubit/qubit and qubit/qutrit s…