Persistent entanglement in arrays of interacting particles

We study the entanglement properties of a class of N-qubit quantum states t hat are generated in arrays of qubits with an Ising-type interaction. These states contain a large amount of entanglement as given by their Schmidt me asure. They also have a high persistency of entanglement which means that s imilar toN/2 qubits have to he measured to disentangle the state. These sta tes can be regarded as an entanglement resource since one can generate a fa mily of other multiparticle entangled states such as the generalized Greenb erger-Horne-Zeilinger states of <N/2 qubits by simple measurements and clas sical communication.