Correction to: npj Quantum Information https://doi.org/10.1038/s41534-020-00356-0, published online 22 January 2021

The original version of this Article omitted a funding source in the Acknowledgements: ‘ASCENT+ (grant agreement no. 871130),’.

The correct Acknowledgements read: This work was financially supported by the European Research Council (ERC) under the European Union’s Horizon 2020 Research and Innovation Programmes (SPQRel, grant agreement no. 679183), ASCENT+ (grant agreement no. 871130), the Linz Institute of Technology (LIT) through the LIT Secure and Correct Systems Lab funded by the state of Upper Austria and the Austrian Science Fund (FWF): P29603.

This has now been corrected in both the PDF and HTML versions of the Article.