60 citations · 93 across the 5 of their papers we have counts for
5 papers
Entanglement and area laws in weakly correlated gaussian states
J. M. Matera, R. Rossignoli, N. Canosa
We examine the evaluation of entanglement measures in weakly correlated gaussian states. It is shown that they can be expressed in terms of the singular values of a particular bloc…
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…
Evaluation of pairwise entanglement in translationally invariant systems with the random phase approximation
Juan Mauricio Matera, Raul Rossignoli, Norma Canosa
We discuss a general mean field plus random phase approximation (RPA) for describing composite systems at zero and finite temperature. We analyze in particular its implementation i…
Entanglement of finite cyclic chains at factorizing fields
R. Rossignoli, N. Canosa, J. M. Matera
We examine the entanglement of cyclic spin 1/2 chains with anisotropic XY Z Heisenberg couplings of arbitrary range at transverse factorizing magnetic fields. At these fields the s…
Description of thermal entanglement with the static path plus random-phase approximation
N. Canosa, J. M. Matera, R. Rossignoli
We discuss the application of the static path plus random phase approximation (SPA+RPA) and the ensuing mean field+RPA treatment to the evaluation of entanglement in composite quan…