tion primitives, such as quantum teleportation, are
truly nonclassical.
Acknowledgements. We are grateful to Joseph
Bowles for useful comments on a draft of this
manuscript. We acknowledge financial support
from the the European Union’s Marie Sklodowska-
Curie individual Fellowships (H2020-MSCA-IF-2017,
GA794842), Spanish MINECO (Severo Ochoa SEV-
2015-0522 and project QIBEQI FIS2016-80773-P),
Fundacio Cellex and Generalitat de Catalunya
(CERCA Programme and SGR 875).
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Accepted in Quantum 2020-04-20, click title to verify. Published under CC-BY 4.0. 8