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Complementarity and the algebraic structure of 4-level quantum systems

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 نشر من قبل Denes Petz
 تاريخ النشر 2008
  مجال البحث فيزياء
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The history of complementary observables and mutual unbiased bases is reviewed. A characterization is given in terms of conditional entropy of subalgebras. The concept of complementarity is extended to non-commutative subalgebras. Complementary decompositions of a 4-level quantum system are described and a characterization of the Bell basis is obtained.

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