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Landsman, K. A., Wu, Y. ., Leung, P. H., Zhu, D. ., Linke, N. M., Brown, K. R., … Monroe, C. . (2019). Two-qubit entangling gates within arbitrarily long chains of trapped ions. Physical Review A, 100. http://doi.org/10.1103/PhysRevA.100.022332