Types of quantum information

Robert B. Griffiths
Phys. Rev. A 76, 062320 – Published 21 December 2007

Abstract

Quantum, in contrast to classical, information theory, allows for different incompatible types (or species) of information which cannot be combined with each other. Distinguishing these incompatible types is useful in understanding the role of the two classical bits in teleportation (or one bit in one-bit teleportation), for discussing decoherence in information-theoretic terms, and for giving a proper definition, in quantum terms, of “classical information.” Various examples (some updating earlier work) are given of theorems which relate different incompatible kinds of information, and thus have no counterparts in classical information theory.

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  • Received 14 August 2007

DOI:https://doi.org/10.1103/PhysRevA.76.062320

©2007 American Physical Society

Authors & Affiliations

Robert B. Griffiths*

  • Department of Physics, Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213, USA

  • *rgrif@cmu.edu

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Vol. 76, Iss. 6 — December 2007

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