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14-qubit entanglement: creation and coherence

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arxiv 1009.6126 v2 pith:WNSDHM2V submitted 2010-09-30 quant-ph

Thomas Monz , Philipp Schindler , Julio T. Barreiro , Michael Chwalla , Daniel Nigg , William A. Coish , Maximilian Harlander , Wolfgang Haensel
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Markus Hennrich Rainer Blatt
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classification quant-ph
keywords coherencecreationdecaymodelquantumqubitsaffectedagrees
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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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    quant-ph 2019-06 unverdicted

    Reviews paradigmatic entanglement quantifiers and state-of-the-art detection/certification methods, with emphasis on assumptions about states and measurements.

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