Hardy's paradox as a demonstration of quantum irrealism

Abstract

Hardy's paradox was originally presented as a demonstration, without inequalities, of the incompatibility between quantum mechanics and the hypothesis of local causality. Equipped with newly developed tools that allow for a quantitative assessment of realism, here we revisit Hardy's paradox and argue that non-local causality is not mandatory for its solution; quantum irrealism suffices.

14 pages, 3 figures, typos corrected

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Cited by in corpus (9)

• Experimental assessment of physical realism in a quantum-controlled device
• Complete complementarity relations: Connections with EPR realism and decoherence and extension to mixed quantum states
• Quantum realism: axiomatization and quantification
• Reality variation under monitoring with weak measurements
• Genuine multipartite entanglement and quantum coherence in an electron-positron system: Relativistic covariance
• Geometric monotones of violations of quantum realism
• Many-Worlds Interpretation of Quantum Mechanics: A Paradoxical Picture
• Two-time quantities as elements of physical reality
• Violation of Bell Inequalities: Mapping the Conceptual Implications