Hahn, H.; Zarantonello, G.; Schulte, M.; Bautista-Salvador, A.; Hammerer, K. et al.: Integrated 9Be+ multi-qubit gate device for the ion-trap quantum computer. In: npj Quantum Information 5 (2019), Nr. 1, 70. DOI:
https://doi.org/10.1038/s41534-019-0184-5