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CTC assisted PR box type correlation can lead to signaling

It is known that there exist non-local correlations that respect no-signaling criterion, but violate Bell-type inequalities more than quantum-mechanical correlations. Such super quantum correlations were introduced as the Popescu-Rohrlich (PR) box. We consider such non-local boxes with two/three inputs and two/three outputs. We show that these super quantum correlations can lead to signaling when at least one of the input bit has access to a word line along a closed time-like curve.

preprint2014arXivOpen access
Indranil ChakrabartyTanumoy PramanikArun K PatiPankaj Agrawal
quant-ph
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Open access4 authors1 topic
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Indranil ChakrabartyTanumoy PramanikArun K PatiPankaj Agrawal

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