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. 2011 Apr 1;106(13):130506.
doi: 10.1103/PhysRevLett.106.130506. Epub 2011 Mar 31.

14-Qubit entanglement: creation and coherence

Thomas Monz  1 , Philipp Schindler, Julio T Barreiro, Michael Chwalla, Daniel Nigg, William A Coish, Maximilian Harlander, Wolfgang Hänsel, Markus Hennrich, Rainer Blatt
Affiliations

14-Qubit entanglement: creation and coherence

Thomas Monz et al. Phys Rev Lett. .

Abstract

We report the creation of Greenberger-Horne-Zeilinger states with up to 14 qubits. By investigating the coherence of up to 8 ions over time, we observe a decay proportional to the square of the number of qubits. The observed decay agrees with a theoretical model which assumes a system affected by correlated, Gaussian phase noise. This model holds for the majority of current experimental systems developed towards quantum computation and quantum metrology.

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