25 citations · 38 across the 2 of their papers we have counts for
2 papers
quant-ph2010★ 13 cited
Evaluation of ground state entanglement in spin systems with the random phase approximation
J. M. Matera, R. Rossignoli, N. Canosa
We discuss a general treatment based on the mean field plus random phase approximation (RPA) for the evaluation of subsystem entropies and negativities in ground states of spin sys…
quant-ph2010★ 25 cited
Separability and entanglement in finite dimer-type chains in general transverse fields
Norma Canosa, Raul Rossignoli, Juan Mauricio Matera
We determine the conditions under which general dimer-type spin chains with couplings of arbitrary range in a general transverse field will exhibit an exactly separable parit…