Brougham, T and Andersson, Anna and Barnett, S M (2006) Cloning and joint measurements of incompatible components of spin. Physical Review A, 73 (6). -. ISSN 1094-1622Full text not available in this repository. (Request a copy from the Strathclyde author)
A joint measurement of two observables is a simultaneous measurement of both quantities upon the same quantum system. When two quantum-mechanical observables do not commute, then a joint measurement of these observables cannot be accomplished directly by projective measurements alone. In this paper we shall discuss the use of quantum cloning to perform a joint measurement of two components of spin associated with a qubit system. We introduce cloning schemes which are optimal with respect to this task. The cloning schemes may be thought to work by cloning two components of spin onto their outputs. We compare the proposed cloning machines to existing cloners.
|Keywords:||quantum cloning, asymmetric cloning, cloning, Optics. Light, Atomic and Molecular Physics, and Optics|
|Subjects:||Science > Physics > Optics. Light|
|Department:||Faculty of Science > Physics|
|Depositing user:||Pure Administrator|
|Date Deposited:||22 Jun 2011 14:35|
|Last modified:||04 May 2016 18:27|