Correction to: npj Quantum Information https://doi.org/10.1038/s41534-017-0048-9 published online 15 December 2017

In the original version of this paper, Hiroki Takesue was incorrectly listed as the corresponding author. The corresponding author should be Yoshihisa Yamamoto. In the Acknowledgements, the name C. Langrock was incorrectly written as L. Carsten. These errors have now been corrected in the HTML and PDF versions of this article.