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Quantum Coupling and Strassen Theorem

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arxiv 1803.10393 v1 pith:32O25YUD submitted 2018-03-28 quant-ph cs.LO

Quantum Coupling and Strassen Theorem

classification quant-ph cs.LO
keywords probabilityquantumtheoremcouplingcouplingsdistributioneventstrassen
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We introduce a quantum generalisation of the notion of coupling in probability theory. Several interesting examples and basic properties of quantum couplings are presented. In particular, we prove a quantum extension of Strassen theorem for probabilistic couplings, a fundamental theorem in probability theory that can be used to bound the probability of an event in a distribution by the probability of an event in another distribution coupled with the first.

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