Perturbative unitarity bounds from momentum-space entanglement

Acknowledgements: We would like to thank Daniel Baumann, Marine de Clerck, Thomas Colas, Jackson Fliss, Jiri Minar, Geoff Penington, David Skinner, Ronak Soni and Dong-Gang Wang for useful discussions. E.P. and C.D.P. have been supported in part by the research program VIDI with Project No. 680-47-535, which is (partly) financed by the Netherlands Organisation for Scientific Research (NWO). C.M. is supported by Science and Technology Facilities Council (STFC) training grant ST/W507350/1. This work has been partially supported by STFC consolidated grant ST/T000694/1 and ST/X000664/1 and by the EPSRC New Horizon grant EP/V017268/1. H.G. is supported by a Postdoctoral Fellowship at National Taiwan University funded by the National Science and Technology Council (NSTC) 113-2811-M-002-073. H.G. was also supported jointly by the Science and Technology Facilities Council through a postgraduate studentship and the Cambridge Trust Vice Chancellor’s Award. H.G. was also supported by a Postdoctoral Fellowship at National Taiwan University funded by the Ministry of Education (MOE) NTU-112L4000-1. The work of C.D.P. is supported by the Scuola Normale Superiore.