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- W2968052257 abstract "We analyze the achievable limits of the quantum information processing of the weak interaction revealed by hyperons with spin. We find that the weak decay process corresponds to an interferometric device with a fixed visibility and fixed phase difference for each hyperon. Nature chooses rather low visibilities expressing a preference to parity conserving or violating processes (except for the decay $Sigma^+longrightarrow p pi^0$). The decay process can be considered as an open quantum channel that carries the information of the hyperon spin to the angular distribution of the momentum of the daughter particles. We find a simple geometrical information theoretic interpretation of this process: two quantization axes are chosen spontaneously with probabilities $frac{1pmalpha}{2}$ where $alpha$ is proportional to the visibility times the real part of the phase shift. Differently stated the weak interaction process corresponds to spin measurements with an imperfect Stern-Gerlach apparatus. Equipped with this information theoretic insight we show how entanglement can be measured in these systems and why Bell's nonlocality (in contradiction to common misconception in literature) cannot be revealed in hyperon decays. We study also under which circumstances contextuality can be revealed." @default.
- W2968052257 created "2019-08-22" @default.
- W2968052257 creator A5011840878 @default.
- W2968052257 date "2014-10-07" @default.
- W2968052257 modified "2023-09-27" @default.
- W2968052257 title "Revealed Quantum Information in Weak Interaction Processes" @default.
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