No-hypersignaling principle
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 ex...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
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American Physical Society
2017
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| _version_ | 1797076224751697920 |
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| author | Dall'Arno, M Brandsen, S Tosini, A Buscemi, F Vedral, V |
| author_facet | Dall'Arno, M Brandsen, S Tosini, A Buscemi, F Vedral, V |
| author_sort | Dall'Arno, M |
| collection | OXFORD |
| description | 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. |
| first_indexed | 2024-03-07T00:01:04Z |
| format | Journal article |
| id | oxford-uuid:75f83f16-7ca2-4efb-9858-5758eabe170b |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:01:04Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:75f83f16-7ca2-4efb-9858-5758eabe170b2022-03-26T20:12:43ZNo-hypersignaling principleJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:75f83f16-7ca2-4efb-9858-5758eabe170bEnglishSymplectic Elements at OxfordAmerican Physical Society2017Dall'Arno, MBrandsen, STosini, ABuscemi, FVedral, VA 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. |
| spellingShingle | Dall'Arno, M Brandsen, S Tosini, A Buscemi, F Vedral, V No-hypersignaling principle |
| title | No-hypersignaling principle |
| title_full | No-hypersignaling principle |
| title_fullStr | No-hypersignaling principle |
| title_full_unstemmed | No-hypersignaling principle |
| title_short | No-hypersignaling principle |
| title_sort | no hypersignaling principle |
| work_keys_str_mv | AT dallarnom nohypersignalingprinciple AT brandsens nohypersignalingprinciple AT tosinia nohypersignalingprinciple AT buscemif nohypersignalingprinciple AT vedralv nohypersignalingprinciple |