104 citations · 788 across the 41 of their papers we have counts for
8 papers · 2 filters
Quantum correlations and least disturbing local measurements
R. Rossignoli, N. Canosa, L. Ciliberti
We examine the evaluation of the minimum information loss due to an unread local measurement in mixed states of bipartite systems, for a general entropic form. Such quantity provid…
Global entanglement in XXZ chains
N. Canosa, R. Rossignoli
We examine the thermal entanglement of XXZ-type Heisenberg chains in the presence of a uniform magnetic field along the z axes, through the evaluation of the negativity associated…
Quantum discord in finite XY chains
L. Ciliberti, R. Rossignoli, N. Canosa
We examine the quantum discord between two spins in the exact ground state of finite spin 1/2 arrays with anisotropic XY couplings in a transverse field B. It is shown that in the…
Thermal entanglement in fully connected spin systems and its RPA description
Juan Mauricio Matera, Raul Rossignoli, Norma Canosa
We examine the thermal pairwise entanglement in a symmetric system of spins fully connected through anisotropic -type couplings embedded in a transverse magnetic field. We…
Generalized entropic measures of quantum correlations
R. Rossignoli, N. Canosa, L. Ciliberti
We propose a general measure of non-classical correlations for bipartite systems based on generalized entropic functions and majorization properties. Defined as the minimum informa…
Even-odd entanglement in boson and spin systems
Raul Rossignoli, Norma Canosa, Juan Mauricio Matera
We examine the entanglement entropy of the even half of a translationally invariant finite chain or lattice in its ground state. This entropy measures the entanglement between the…