Tensor product representation of qubit and its transform under linear-operator action

Peter Adam, Vladimir A. Andreev, Jozsef Janszky, Margarita A. Man'Ko, Olga V. Man'Ko, Vladimir I. Man'Ko

Research output: Contribution to journalArticle

2 Citations (Scopus)


The general one-particle spin states are considered. It is shown that information contained in a spin-1/2 state can be recorded in an equivalent form with the help of three mixed completely decoherent qubit states. The density matrix of such a system has the form of the tensor product of three diagonal matrices. The linear operator defined in the space of one-particle spin states generates some transform of the tensor products of the diagonal matrices. We construct this transform in the explicit form.

Original languageEnglish
Pages (from-to)109-121
Number of pages13
JournalJournal of Russian Laser Research
Issue number2
Publication statusPublished - Mar 1 2009



  • Density matrix
  • Entangled states
  • Information
  • Quantum computer
  • Quantum tomography
  • Spin state

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)

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