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Monz T Schindler P Barreiro JT Chwalla M Nigg D Coish WA Harlander M Hänsel W Hennrich M Blatt R 《Physical review letters》2011,106(13):130506
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. 相似文献