Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Bell inequalities from Information Causality -- tight for
  Macroscopic Locality   In a Bell test, the set of observed probability distributions complying with
the principle of local realism is fully characterized by Bell inequalities.
Quantum theory allows for a violation of these inequalities, which is famously
regarded as Bell nonlocality. Finding the maximal degree of this violation is,
however, an undecidable problem. Consequently, no algorithm can be used to
derive quantum analogs of Bell inequalities, which would characterize the set
of probability distributions allowed by quantum theory. Here we present a
family of inequalities, which approximate the set of quantum correlations in
Bell scenarios where the number of settings or outcomes can be arbitrary. We
derive these inequalities from the principle of Information Causality, and
thus, we do not assume the formalism of quantum mechanics. Moreover, we
identify a subspace in the correlation space for which the derived inequalities
give the necessary and sufficient conditions for the principle of Macroscopic
Locality. As a result, we show that in this subspace, the principle of
Information Causality is strictly stronger than the principle of Macroscopic
Locality.

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The categories of this paper are: cond-mat
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The categories of this paper are: acc-phys
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The categories of this paper are: q-bio
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The categories of this paper are: chem-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: nlin
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The categories of this paper are: ao-sci
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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: hep-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
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The categories of this paper are: physics
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The categories of this paper are: hep-th
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The categories of this paper are: comp-gas