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Cloning and joint measurements of incompatible components of spin

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 1050-2947

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Abstract

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.

Item type: Article
ID code: 31076
Keywords: quantum cloning, asymmetric cloning, cloning, Optics. Light, Atomic and Molecular Physics, and Optics
Subjects: Science > Physics > Optics. Light
Department: Faculty of Science > Physics
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 22 Jun 2011 15:35
    Last modified: 05 Sep 2014 08:53
    URI: http://strathprints.strath.ac.uk/id/eprint/31076

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