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Orthodox Quantum Mechanics

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Interpreting Physics

Part of the book series: Boston Studies in the Philosophy of Science ((BSPS,volume 289))

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Abstract

This chapter develops the measurement interpretation of quantum mechanics. This is an austere systematized version of the orthodox Copenhagen interpretation. Dirac used an analysis of the distinctive features of quantum measurements as a basis for developing the mathematical formalism of quantum mechanics. Schwinger put this on a more systematic basis and extended the formalism to include quantum electrodynamics and basic quantum field theory. This measurement formulation does not accommodate further advances in quantum field theory or quantum cosmology, where there is no outside observer.

These things, therefore, having been expressed by us with the greatest accuracy and attention, the Holy Ecumenical Synod declares that no one shall be allowed to bring forward, nor to write, nor to put together, nor to frame a different faith, nor to teach others anything different.

Council of Chalcedon, 451 A. D.

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Notes

  1. 1.

    The term ‘orthodox’ stems from the Council of Chalcedon, which set the standards of orthodoxy accepted by the Eastern Orthodox, Roman Catholic, and mainstream Protestant Churches. By a curious turn some theologians are now using Bohr’s doctrine of complementarity to explain the Chalcedonian decrees. See Richardson and Wildman (1996), pp. 253–298.

  2. 2.

    Surveys of the problems treated by matrix mechanics may be found in Mehra-Rechenberg (1982, Vol. 4, Part 2); and in Max Born’s 1926 lectures (Born 1962, p. 68–129).

  3. 3.

    For more details see: Mehra-Rechenberg (1982, Vol. 5, Part 2, pp. 838–854); Hund (1974), chaps. 12–14; Jammer (1966), 362–365; Pauli (1947 [1932]), 161–214; Bethe (1999) and Kuhn et al. (1962).

  4. 4.

    This is a summary of ideas Bohr presented in October, 1931. A more detailed analysis is given in MacKinnon (1982a, chap. 8) and MacKinnon (1985).

  5. 5.

    “… the Copenhagen interpretation regards things and processes which are describable in terms of classical concepts, i.e., the actual, as the foundation of any physical interpretation” (Heisenberg 1958, p. 145).

  6. 6.

    Pauli, Bohr’s closest ally on interpretative issues, contrasted Reichenbach’s attempt to formulate quantum mechanics as an axiomatic theory with his own position: “Quantum mechanics is a much less radical procedure. It can be considered the minimum generalization of the classical theory which is necessary to reach a self-consistent description of micro phenomena, in which the finiteness of the quantum of action is essential” (Pauli 1947, p. 1404).

  7. 7.

    In an interview with Thomas Kuhn and others the day before his death Bohr claimed “There are all kinds of people, but I think it would be reasonable to say that no man who is called a philosopher really understands what one means by the complementary description. … They did not see that it was an objective description, and that it is the only possible objective description” (Bohr, AHQP, Interview 3, 5).

  8. 8.

    See Gomatam (2007) for a clarification of the difference between Bohr’s position and the standard Copenhagen interpretation.

  9. 9.

    Coecke et al. (2001) provides a good historical summary of the axiomatic approach.

  10. 10.

    Healey (1989), Hughes (1989), and Van Fraassen (1991) have developed interpretations of QM using the semantic method of interpretation.

  11. 11.

    The account of measurement was developed in von Neumann (1955 [1932], chap. 6). In a conversation with Abner Shimony, Eugene Wigner claimed “I have learned much about quantum theory from Johnny, but the material in his Chapter Six Johnny learned all from me.” (citation from Aczel 2001, p. 102)

  12. 12.

    Bub (1997), chap. 7 gives a technical treatment that examines Bohr’s position, the ‘von Neuman-Dirac orthodoxy’ and Bub’s own development based on the Bub-Clifton theorem.

  13. 13.

    Arguments supporting this evaluation are given in my 2007 and 2008 papers.

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Mackinnon, E. (2012). Orthodox Quantum Mechanics. In: Interpreting Physics. Boston Studies in the Philosophy of Science, vol 289. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-2369-6_5

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