2024-03-29T14:20:00Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00024733
2023-01-16T04:15:11Z
312:313:314
No-Hypersignaling Principle
Dall’Arno, Michele
73413
Brandsen, Sarah
73414
Tosini, Alessandro
73415
Buscemi, Francesco
73416
Vedral, Vlatko
73417
A paramount topic in quantum foundations, rooted in the study of the Einstein-Podolsky-Rosen (EPR) paradox and Bell inequalities, is that of characterizing quantum theory in terms of the spacelike correlations it allows. Here, we show that to focus only on spacelike correlations is not enough: we explicitly construct a toy model theory that, while not contradicting classical and quantum theories at the level of spacelike correlations, still displays an anomalous behavior in its timelike correlations. We call this anomaly, quantified in terms of a specific communication game, the “hypersignaling” phenomena. We hence conclude that the “principle of quantumness,” if it exists, cannot be found in spacelike correlations alone: nontrivial constraints need to be imposed also on timelike correlations, in order to exclude hypersignaling theories.
journal article
American Physical Society
2017-07-14
application/pdf
Physical Review Letters
2
119
020401
020401
https://doi.org/10.1103/PhysRevLett.119.020401
http://hdl.handle.net/2237/26955
0031-9007
https://nagoya.repo.nii.ac.jp/record/24733/files/PhysRevLett_119_020401.pdf
eng
https://doi.org/10.1103/PhysRevLett.119.020401
© 2017 American Physical Society