Recent interest in aspects common to quantum information and condensed matter has
prompted a flurry of activity at the border of these disciplines that were far distant until a few …

We determine the conditions for the existence of a pair of degenerate parity breaking
separable eigenstates in general arrays of arbitrary spins connected through XYZ couplings …

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 …

Thermal entanglement of a two-qutrit XX spin chain with Dzialoshinski–Moriya interaction -
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We evaluate the exact concurrence between any two spins in a cyclic XX chain of n spins
placed in a uniform transverse magnetic field, at both zero and finite temperature, by means …

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 …

We study the thermal output entanglement and teleportation in a two qubit Heisenberg XXZ
chain with different Dzyaloshinskii–Moriya (DM) interactions. The analytical expressions of …

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 …

We study the dynamics of nearest-neighbor entanglement for a one-dimensional spin chain
with a nearest-neighbor time-dependent Heisenberg coupling J (t) between the spins in the …

We investigate entanglement and coherence in an XXZ spin s pair immersed in a non-
uniform transverse magnetic field. The ground state and thermal entanglement phase …