03/08/2022
They show that real and complex Hilbert-space formulations of quantum theory make different predictions in network scenarios comprising independent states and measurements. This allows them to devise a Bell-like experiment, the successful realization of which would disprove real quantum theory, in the same way as standard Bell experiments disproved local physics.
For more information see:
https://www.nature.com/articles/s41586-021-04160-4#Abs1
https://www.oeaw.ac.at/detail/news/keine-quantentheorie-ohne-imaginaere-zahlen
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