We propose a simple geometrical approach for finding robustness of entanglement for Bell decomposable

states of two-qubit quantum systems. It is shown that for these states robustness is equal to

the concurrence. We also present...

of the variance on the time and also the coin–position entanglement, i.e. two important quantum aspects of the coherent quantum walk, are preserved in the presence of tunneling decoherence. Furthermore, we present an explicit expression for the probability...

We study the boson–parafermion entanglement of the parasupersymmetric coherent

states of the harmonic oscillator and derive the degree of entanglement in terms of the

concurrence. The conditions for obtaining the maximal entanglement...

We will study entangled two-photon states generated from a two-mode supersymmetric

model and quantify degree of entanglement in terms of the entropy of entanglement.

The influences of the nonlinearity on the degree of entanglement...

We study the thermal entanglement in a two-spin-qutrit system with anisotropy in

the exchange coupling between two spins. We use the realignment criterion to

distinguish the entangled states, and the negativity for measuring...

We study the dynamics of two lower bounds of concurrence in bipartite quantum systems when one party

goes through an arbitrary channel. We show that these lower bounds obey the factorization law similar to that of ...

. With two typical examples, we show that our

method can detect more entangled states and also can give sharper lower bonds than

the similar ones....

In this paper, we use the concurrence vector as a measure of entanglement, and investigate lower and upper bounds on the concurrence of a superposition of bipartite states as a function of the concurrence of the superposed states. We show...

We study the entanglement dynamics of an anisotropic two-qubit Heisenberg XYZ system in

the presence of intrinsic decoherence. The usefulness of such a system for performance of the quantum

teleportation protocol T0 and entanglement...

The role of spin-orbit interaction in the ground state and thermal entanglement of a Heisenberg XYZ two-qubit system in the presence of an inhomogeneous magnetic field is investigated. We show that the ground state entanglement tends to vanish...