Entropic uncertainties for joint quantum measurements

T. Brougham, E. Andersson, S.M. Barnett

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We investigate the uncertainty associated with a joint quantum measurement of two spin components of a spin- 1 2 particle and quantify this in terms of entropy. We consider two entropic quantities, the joint entropy and the sum of the marginal entropies, and obtain lower bounds for each of these quantities. For the case of joint measurements where we measure each spin observable equally well, these lower bounds are tight.
Original languageEnglish
JournalPhysical Review A
Issue number4
Publication statusPublished - Oct 2009


  • entropic uncertainties
  • joint quantum measurements


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