Persistent entanglement in arrays of interacting particles.

  title={Persistent entanglement in arrays of interacting particles.},
  author={Hans J. Briegel and Robert Raussendorf},
  journal={Physical review letters},
  volume={86 5},
We study the entanglement properties of a class of N-qubit quantum states that are generated in arrays of qubits with an Ising-type interaction. These states contain a large amount of entanglement as given by their Schmidt measure. They also have a high persistency of entanglement which means that approximately N/2 qubits have to be measured to disentangle the state. These states can be regarded as an entanglement resource since one can generate a family of other multiparticle entangled states… 

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