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Proceedings Paper

Robustness of multiqubit entanglement
Author(s): Leonid Fedichkin; Arkady Fedorov; Vladimir Privman
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Paper 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.

Paper Details

Date Published: 12 May 2006
PDF: 9 pages
Proc. SPIE 6244, Quantum Information and Computation IV, 624408 (12 May 2006); doi: 10.1117/12.663366
Show Author Affiliations
Leonid Fedichkin, Clarkson Univ. (United States)
Arkady Fedorov, Clarkson Univ. (United States)
Univ. Karlsruhe (Germany)
Vladimir Privman, Clarkson Univ. (United States)


Published in SPIE Proceedings Vol. 6244:
Quantum Information and Computation IV
Eric J. Donkor; Andrew R. Pirich; Howard E. Brandt, Editor(s)

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