Characterizing high-dimensional quantum contextuality

• URL: http://arxiv.org/abs/2212.11559v2
• Date: Sun, 17 Mar 2024 06:32:23 GMT
• Title: Characterizing high-dimensional quantum contextuality
• Authors: Xiao-Dong Yu, Isadora Veeren, Otfried Gühne,
• Abstract summary: Quantum contextuality is an essential resource in many quantum information processing tasks. We provide systematic reliable methods for characterizing quantum contextuality in systems of fixed dimension. As an application, our methods reveal the non-dimensional quantum contextuality structure.
• Score: 1.085294773316861
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: As a phenomenon encompassing measurement incompatibility and Bell nonlocality, quantum contextuality is not only central to our understanding of quantum mechanics, but also an essential resource in many quantum information processing tasks. The dimension-dependent feature of quantum contextuality is known ever since its discovery, but systematic methods for characterizing the quantum contextuality in systems with fixed dimension are still lacking. In this work, we solve this problem. We provide systematic and reliable methods for verifying whether or not an obtained probability distribution can result from a $d$-dimensional quantum system, as well as calculating finite-dimensional violation of a general noncontextuality inequality. As an application, our methods reveal the non-convex structure of finite-dimensional quantum contextuality.

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