Quantum Mechanics, A Half Century Later

1. Front Matter

   Pages I-X

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2. Include the Observer in the Wave Function?

   • John Archibald Wheeler

   Pages 1-18

3. On the Possible Connections between Quantum Mechanics and Gravitation

   • A. Frenkel

   Pages 19-38

4. The Quantum Probability Calculus

   • J. M. Jauch

   Pages 39-62

5. Quantum Logics and Ideal Measurements of the First Kind

   • G. Cassinelli, E. G. Beltrametti

   Pages 63-67

6. A First Lecture on Quantum Mechanics

   • C. Piron

   Pages 69-87

7. Essay on the Development of the Statistical Theory of the Calculus of Probability

   • S. P. Shushurin

   Pages 89-105

8. The Quantum Mechanical One-System Formalism, Joint Probabilities and Locality

   • M. Mugur-Schächter

   Pages 107-146

9. On Propositions and Physical System

   • B. D’espagnat

   Pages 147-169

10. Towards a Proper Quantum Theory

    • Jean-Marc Lévy-Leblond

    Pages 171-206

11. On the Intuitive Understanding of Non-Locality as Implied by Quantum Theory

    • D. Bohm, B. Hiley

    Pages 207-225

12. Four Ideas of David Bohm on the Relationship between Quantum Mechanics and Relativity

    • R. Lestienne

    Pages 227-235

13. The Role of Quantum Mechanics in the Set-Up of a Mathematical Government among Molecular Populations

    • R. Daudel

    Pages 237-244

14. Hidden Parameters, Hidden Probabilities

    • Georges Lochak

    Pages 245-259

15. The Recent Attempts to Verify Quantum Mechanics

    • Michel Paty

    Pages 261-289

16. Spin Correlation Measurement in Proton-Proton Scattering and Comparison with the Theories of the Local Hidden Variables

    • M. Lamehi-Rachti, W. Mittig

    Pages 291-303

17. Back Matter

    Pages 305-311

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The articles collected in this volume were written for a Colloquium on Fifty Years of Quantum Mechanics which was held at the University Louis Pasteur of Strasbourg on May 2-4, 1974, in commemoration of the original work by De Broglie in 1924. It is our hope that this volume will convey to the reader the idea that quantum mechanics, besides being a fundamental tool for scien­ tific workers today, is also a source of a number of questions and thoughts about the interpretation of the foundation of quantum mechanics itself. This gives rise to problems of a philosophical and logical character and has repercussions on other domains such as the theory of gravitation. Besides the papers presented at the Colloquium, an article has been included by D. Bohm and B. Hiley. This compensates, perhaps, for the article of S. Kochen, whose manuscript unfortunately did not reach us in time for inclusion in ~his volume. A few months after this Colloquium we learned of the death of Professor Jauch, who had taken a lively and crucial part in its discussions. We have been extremely saddened by the news of his death, and would like to express our long standing indebtedness to him as a physicist.

• calculus of probability
• probability
• proposition
• quantum mechanics

• Université Louis Pasteur, Strasbourg, France

  José Leite Lopes

• Centre de Recherches Nucleaires et Université Louis Pasteur, Strasbourg, France

  Michel Paty

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