Download The completion of quantum mechanics, 1926-1941 by Jagdish Mehra PDF

By Jagdish Mehra

Pt. 1. The chance interpretation and the statistical transformation idea, the actual interpretation, and the empirical and mathematical foundations of quantum mechanics, 1926-1932 -- pt. 2. The conceptual of entirety and the extensions of quantum mechanics, 1932-1941. Epilogue, elements of the additional improvement of quantum thoery, 1942-1999

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Extra info for The completion of quantum mechanics, 1926-1941

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Von WeizsaÈcker rather concluded: The uncertainty relations cannot be applied to ``non-prognostic measurements'' because of the only reason: the theorems stating their results do not contain statements about physically possible measurements; on the other hand, conclusions about the past obey the same accuracy as those about the future, due to the symmetry of quantum-mechanical laws with respect to the time direction. (von WeizsaÈcker in Popper, 1934, p. 5)Ðcould hardly be accused of being in¯uenced by any feeling of cultural pessimism.

The wave-mechanical scheme indeed seemed to provide the best chance of retaining the causal principle formulation, which was similar to that of the classical theories. The opponents of the causal interpretation of quantum mechanics, on the other hand, stuck (in Planck's view) too much to the ancient concept of a mass point. Max von Laue, Planck's former student (and later, his colleague and friend in Berlin), agreed in this opinion when he published a note `Zu den EroÈrterungen uÈber KausalitaÈt (About the Discussions on Causality)' in the Naturwissenschaften (von Laue, 1932b).

1 The Causality Debate 705 convenience of one or the other view in our thinking about nature. Henri Poincare has stated that we may be allowed to apply to real space the Euclidean as well as nonEuclidean geometry without fearing to be contradicted by facts. The physical laws which we discover, however, are functions of the geometry applied, and it may happen that one geometry leads to complicated and the other to simpler physical laws. Then one geometry turns out to be convenient, the other inconvenient, and the words ``right'' or ``wrong'' should not be used.

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