Entropic uncertainties for joint quantum measurements

Brougham, T. and Andersson, E. and Barnett, S.M. (2009) Entropic uncertainties for joint quantum measurements. Physical Review A, 80 (4). ISSN 1050-2947 (http://dx.doi.org/10.1103/PhysRevA.80.042106)

Abstract

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.

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• Item metadata

  Item type:	Article
  ID code:	18899
  Dates:	Date Event October 2009 Published
  Subjects:	Science > Physics
  Department:	Faculty of Science > Physics
  Depositing user:	Strathprints Administrator
  Date deposited:	20 May 2010 15:29
  Last modified:	11 Nov 2024 09:27
  URI:	https://strathprints.strath.ac.uk/id/eprint/18899