By Gen Kimura and others

It has long been known as the Wigner-Araki-Yanase (WAY) theorem that additive conservation laws limit the accuracy of measurements. Recently, various quantitative expressions have been found to enforce and generalize the claim and applied to evaluating quantum noise in quantum information processing. Here, we investigate generalizations to multiplicative conservation laws.... Show more

July 24, 2007

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Quantum Limits of Measurements induced by Multiplicative Conservation Laws: An Extension of the Wigner-Araki-Yanase Theorem

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