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

Author: Thomas Monz, Philipp Schindler, Julio T. Barreiro, Michael Chwalla, Daniel Nigg, William A. Coish, Maximilian Harlander, Wolfgang

Source: https://arxiv.org/

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