Persistent entanglement in arrays of interacting particles

Details Persistent entanglement in arrays of interacting particles Persistent entanglement in arrays of interacting particles

2000-04-11

arxiv.org/abs/quant-ph/0004051v2

Physics

Quantum Physics

4 pages, 1 figure. Revised version puts more emphasis on the presentation of the cluster states as a novel class of N-qubit en

Scientific paper

10.1103/PhysRevLett.86.910

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 have also a high {\em persistency of entanglement} which means that $\sim N/2$ 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 multi-particle entangled states such as the generalized GHZ states of $

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