Author(s): H. Kaufmann, T. Ruster, C. T. Schmiegelow, M. A. Luda, V. Kaushal, J. Schulz, D. von Lindenfels, F. Schmidt-Kaler, and U. G. Poschinger
A four-qubit entangled state is created in a scalable ion trap system, with fidelity exceeding 90%.
[Phys. Rev. Lett. 119, 150503] Published Fri Oct 13, 2017