Joint measurements of spin, operational locality and uncertainty
arXiv:quant-ph/0509152 · doi:10.1103/PhysRevA.72.042104
Abstract
Joint, or simultaneous, measurements of non-commuting observables are possible within quantum mechanics, if one accepts an increase in the variances of the jointly measured observables. In this paper, we discuss joint measurements of a spin 1/2 particle along any two directions. Starting from an operational locality principle, it is shown how to obtain a bound on how sharp the joint measurement can be. We give a direct interpretation of this bound in terms of an uncertainty relation.
Accepted for publication in Phys. Rev. A
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Cited by in corpus (41)
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