Multiparticle entanglement under the influence of decoherence

Details Multiparticle entanglement under the influence of decoherence Multiparticle entanglement under the influence of decoherence

2008-05-19

arxiv.org/abs/0805.2873v2

Phys. Rev. A 78, 060301 (2008)

Physics

Quantum Physics

5 pages, 3 figures, v2: final version, to appear as a Rapid Communication in PRA

Scientific paper

10.1103/PhysRevA.78.060301

We present a method to determine the decay of multiparticle quantum correlations as quantified by the geometric measure of entanglement under the influence of decoherence. With this, we compare the robustness of entanglement in GHZ-, cluster-, W- and Dicke states of four qubits and show that the Dicke state is most robust. Finally, we determine the geometric measure analytically for decaying GHZ and cluster states of an arbitrary number of qubits.

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