14-qubit entanglement: creation and coherence
arXiv:1009.6126 · doi:10.1103/PhysRevLett.106.130506
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.
4 pages, 2 figures, 1 table