Bi-Contextuality: A Novel Non-Classical Phenomenon in Bipartite Quantum Systems
- URL: http://arxiv.org/abs/2507.08461v1
- Date: Fri, 11 Jul 2025 10:05:43 GMT
- Title: Bi-Contextuality: A Novel Non-Classical Phenomenon in Bipartite Quantum Systems
- Authors: Gabriel Ruffolo, Nigel Benjamin Lee Junsheng, Kim Mu Young, Dzmitry Matsukevich, Rafael Rabelo, Dagomir Kaszlikowski, Paweł Kurzyński,
- Abstract summary: We present and experimentally demonstrate a novel non-classical phenomenon, bi-contextuality, observed in quantum systems prepared by two independent sources.<n>This discovery plays a key role in the developing framework of network nonlocality, offering a new method for confirming the quantum nature of measurements within a single network node.
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- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We present and experimentally demonstrate a novel non-classical phenomenon, bi-contextuality, observed in quantum systems prepared by two independent sources. This discovery plays a key role in the developing framework of network nonlocality, offering a new method for confirming the quantum nature of measurements within a single network node. Bi-contextuality acts as a reversed Bell scenario: while Bell scenarios involve splitting a system for independent measurements, our approach combines systems from separate independent sources for joint measurements. The outcomes defy classical models that assume independence and non-contextuality. The simplest Bell scenario can be seen as a subset of the Peres-Mermin (PM) square, and our phenomenon represents another important subset of this framework. Moreover, bi-contextuality has notable consequences related to the Pusey-Barrett-Rudolph (PBR) theorem, suggesting that classical psi-ontic models must account for contextuality or the dependence of preparations, challenging established assumptions.
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