Two-state Q-system: Qubit representations

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Obviously the simplest q-systems are the two-state systems. Typical realizations are an atom with its ground state and one of its excited states, a photon with its two polarization states, or an electronic spin with its "up" and "down" states. The smallest unit of q-information, i.e. the qubit, is an abstract two-state q-system. This chapter is technical: you learn standard mathematics of a single abstract qubit.

Original languageEnglish
Pages (from-to)37-45
Number of pages9
JournalLecture Notes in Physics
Publication statusPublished - Jul 1 2011


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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