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12 May 2006 Robustness of multiqubit entanglement
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Abstract
We survey results on the decay of multiqubit entanglement due to internal interactions between qubits. Dipole-dipole interaction induces decoherence of strongly entangled nuclear spins. The dynamics of spin clusters can be described as quantum decoherence due to an effective composite bath consisting of fully correlated and uncorrelated parts. The rate of decoherence scales up as a square root of the number of entangled spins, resulting in linear scaling of a measure of quantum noise. Our theory is consistent with a recent experiment.
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Leonid Fedichkin, Arkady Fedorov, and Vladimir Privman "Robustness of multiqubit entanglement", Proc. SPIE 6244, Quantum Information and Computation IV, 624408 (12 May 2006); https://doi.org/10.1117/12.663366
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