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Concepts of coarse graining in quantum mechanics

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Abstract

Various procedures of coarse graining in quantum mechanics and their relationships are reviewed. A recently developed notion of relative coarse graining is described which is based on a certain type of classical embedding of quantum states. The ensuing structure of the set of quantum observables is studied. As an application of the new concept an operational classical limit procedure is sketched out.

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Authors and Affiliations

  1. Institute for Theoretical Physics, University of Cologne, D-5000, Cologne 41, Germany

    Paul Busch & Ralf Quadt

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  1. Paul Busch
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  2. Ralf Quadt
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Busch, P., Quadt, R. Concepts of coarse graining in quantum mechanics. Int J Theor Phys 32, 2261–2269 (1993). https://doi.org/10.1007/BF00672998

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  • DOI: https://doi.org/10.1007/BF00672998

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