TL;DR
This paper explores why quantum correlations are bounded by the Tsirelson limit, discussing an information-theoretic principle called 'information causality' that explains this quantum restriction.
Contribution
It analyzes and contextualizes the information-theoretic derivation of the Tsirelson bound, highlighting its significance in understanding quantum correlations.
Findings
The Tsirelson bound can be derived from the principle of information causality.
Quantum correlations are constrained by information-theoretic principles.
The work provides insight into why nature prefers quantum over superquantum correlations.
Abstract
Wheeler's question 'why the quantum' has two aspects: why is the world quantum and not classical, and why is it quantum rather than superquantum, i.e., why the Tsirelson bound for quantum correlations? I discuss a remarkable answer to this question proposed by Pawlowski et al (2009), who provide an information-theoretic derivation of the Tsirelson bound from a principle they call 'information causality.'
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