Remarks on the Measurement of Discrete Physical Quantities

  • E. G. Beltrametti
Part of the NATO ASI Series book series (NSSB, volume 226)


The measurability of a physical quantity implies the existence of a corresponding experimental macroscopic device, or measuring apparatus, M — equipped with a reading scale and with instructions on how to couple it with the physical system S under consideration — which has to fulfil a number of necessary requirements to be considered in the sequel.


Physical System Physical Quantity Pure State Density Operator Compound System 
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    L.D. Landau and E.M. Lifshitz, “Quantum Mechanics — Non Relativistic Theory”, Pergamon Press, Oxford (1965).MATHGoogle Scholar

Copyright information

© Plenum Press, New York 1990

Authors and Affiliations

  • E. G. Beltrametti
    • 1
  1. 1.Dipartimento di Fisica dell’Università di Genova and Istituto Nazionale di Fisica NucleareGenovaItaly

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