Foundations of Physics

, Volume 19, Issue 7, pp 905–922

Coupled physical systems

  • David J. Foulis
Part I. Invited Papers Dedicated To Peter Mittelstaedt

DOI: 10.1007/BF01889305

Cite this article as:
Foulis, D.J. Found Phys (1989) 19: 905. doi:10.1007/BF01889305


The purpose of this paper is to sketch an attack on the general problem of representing a composite physical system in terms of its constituent parts. For quantum-mechanical systems, this is traditionally accomplished by forming either direct sums or tensor products of the Hilbert spaces corresponding to the component systems. Here, a more general mathematical construction is given which includes the standard quantum-mechanical formalism as a special case.

Copyright information

© Plenum Publishing Corporation 1989

Authors and Affiliations

  • David J. Foulis
    • 1
  1. 1.Department of Mathematics and StatisticsUniversity of MassachusettsAmherst

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