70 citations · 417 across the 24 of their papers we have counts for
4 papers · 1 filter
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…
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…