Communication-constrained nonlocal correlations
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866914380182978560 |
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| author | Pollyceno, Lucas Freudenheim, Denis Nogueira, José Chaturvedi, Anubhav Rabelo, Rafael Pawłowski, Marcin |
| author_facet | Pollyceno, Lucas Freudenheim, Denis Nogueira, José Chaturvedi, Anubhav Rabelo, Rafael Pawłowski, Marcin |
| contents | Identifying the physical grounds distinguishing quantum theory from broader probabilistic frameworks remains an open challenge. Communication-based proposals -- most notably the principles of impossibility of superluminal signaling and information causality (IC) -- highlight the role of communication in ruling out unphysical theories and offer an operational rationale on why quantum predictions prevail over these alternative models. Nevertheless, most such developments rely on communicating parts optimizing over specific tasks, such as communication complexity problems and random access codes (RAC). In this work, we systematically extend this communication-based approach. We characterize the class of communication tasks relevant for this context, and employ the general information-theoretic framework to derive new operational constraints preventing such unphysical behaviors. Remarkably, our results reveal a broad family of previously undetected implausible behaviors, independent of any particular encoding or decoding strategy, reinforcing the role of communication as a fundamental lens through which physically meaningful theories can be identified. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_08610 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Communication-constrained nonlocal correlations Pollyceno, Lucas Freudenheim, Denis Nogueira, José Chaturvedi, Anubhav Rabelo, Rafael Pawłowski, Marcin Quantum Physics Identifying the physical grounds distinguishing quantum theory from broader probabilistic frameworks remains an open challenge. Communication-based proposals -- most notably the principles of impossibility of superluminal signaling and information causality (IC) -- highlight the role of communication in ruling out unphysical theories and offer an operational rationale on why quantum predictions prevail over these alternative models. Nevertheless, most such developments rely on communicating parts optimizing over specific tasks, such as communication complexity problems and random access codes (RAC). In this work, we systematically extend this communication-based approach. We characterize the class of communication tasks relevant for this context, and employ the general information-theoretic framework to derive new operational constraints preventing such unphysical behaviors. Remarkably, our results reveal a broad family of previously undetected implausible behaviors, independent of any particular encoding or decoding strategy, reinforcing the role of communication as a fundamental lens through which physically meaningful theories can be identified. |
| title | Communication-constrained nonlocal correlations |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2603.08610 |