Theory of unitary spin rotation and spin-state tomography for a single electron and two electrons

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Electron spins in semiconductor nanostructures are considered as one of the most promising candidates of the building blocks for quantum information processing. Initialization, coherent manipulation, and measurement of a single electron spin have been recently established. Here we explore the possibility to manipulate and measure by optical means the states of two electrons as a single qubit in nanostructures and propose methods of spin-state tomography based on Faraday or Kerr rotation for cases of both a single electron and two electrons, as well as a method of the Bell-state measurement for two electrons.

Original languageEnglish
Pages (from-to)A46-A62
JournalJournal of the Optical Society of America B: Optical Physics
Issue number6
Publication statusPublished - 2010 Jun 1


ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

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