Robustness of multiqubit entanglement

Leonid Fedichkin; Arkady Fedorov; Vladimir Privman

doi:10.1117/12.663366

12 May 2006 Robustness of multiqubit entanglement

Leonid Fedichkin, Arkady Fedorov, Vladimir Privman

Proceedings Volume 6244, Quantum Information and Computation IV; 624408 (2006) https://doi.org/10.1117/12.663366
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

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.

Citation Download Citation

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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