Superposition and entanglement are different manifestations of a quantum phase.
LC On Tuesday, May 3, 2022 at 3:32:33 PM UTC-5 leeu...@gmail.com wrote: > May be of interest: > > Entanglement and Superposition Are Equivalent Concepts in Any Physical > Theory > > ABSTRACT > > We prove that given any two general probabilistic theories (GPTs) the > following are equivalent: (i) each theory is nonclassical, meaning that > neither of their state spaces is a simplex; (ii) each theory satisfies a > strong notion of incompatibility equivalent to the existence of > “superpositions”; and (iii) the two theories are entangleable, in the sense > that their composite exhibits either entangled states or entangled > measurements. Intuitively, in the post-quantum GPT setting, a superposition > is a set of two binary ensembles of states that are unambiguously > distinguishable if the ensemble is revealed before the measurement has > occurred, but not if it is revealed after. This notion is important because > we show that, just like in quantum theory, superposition in the form of > strong incompatibility is sufficient to realize the Bennett-Brassard 1984 > protocol for secret key distribution. > > > https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.128.160402 > > Free access preprint: > https://arxiv.org/abs/2109.04446 > > Dirk > > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/3c85097c-ca09-4108-bdf4-775892a15092n%40googlegroups.com.