Classicality of the heat produced by quantum measurements

Measurement error and disturbance, in the presence of conservation laws, are analysed in general operational terms. We provide novel quantitative bounds demonstrating necessary conditions under which accurate or non-disturbing measurements can be achieved, highlighting an interesting interplay between incompatibility, unsharpness, and coherence. From here we obtain a substantial generalisation of the Wigner-Araki-Yanase (WAY) theorem. Our findings are further refined through the analysis of the fixed-point set of the measurement channel, some extra structure of which is characterised here for the first time.

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Classicality of the heat produced by quantum measurements

Cited by 2 publications

References 71 publications

Limits on quantum measurement engines

Limits on quantum measurement engines

Measurement disturbance and conservation laws in quantum mechanics

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