By Bas C. van Fraassen
After introducing the empiricist perspective in philosophy of technology, and the techniques and strategies of the semantic method of clinical theories, van Fraassen discusses quantum idea in 3 levels. He first examines the query of even if and the way empirical phenomena require a non-classical conception, and what kind of conception they require. He then discusses the mathematical foundations of quantum thought with designated connection with advancements within the modelling of interplay, composite structures, and size. eventually, the writer broaches the most questions of interpretation. After providing a critique of past interpretations, he develops a brand new one--the modal interpretation--which makes an attempt to stick as regards to the unique Copenhagen principles with no implying a thorough incompleteness in quantum idea. He back supplies specified realization to the nature of composite, many-body platforms and particularly to the odd personality of assemblies of exact debris in quantum information.
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Extra resources for Quantum mechanics: an empiricist's view
Sample text
If we change our spatial frame of reference by a geometric reflection, then the spin we called ‘up’ will become ‘down’. But whether a given electron is emitted in the direction of the spin cannot have the same answer for both frames of reference. The experiments showed a preponderance of emissions in the direction of spin. This shows that the sort of global asymmetry we can associate with the human race, expressed in terms of hands and heart, can also be found on the level of the nucleus. We could again speculate that parity will be conserved at some still more elementary level.
Asymmetries do often seem merely accidental. For example, humans all have their heart on the same side. Does this establish a global asymmetry for the world as a whole? The local asymmetry in one body defines a global asymmetry if its mirror image exists nowhere in nature. Of course, it can't be just the placing of the heart. Imagine we were spheres, rolling around on the earth, with hearts just off centre. Each sphere would have some asymmetry, but it does not even make sense to ask whether all the spheres have their heart on the same side.
Even if it is a persistent or widespread uniformity, it might still be one which does not derive from any hidden mechanism but just is. Several objections could be raised to my suggestion that Curie's principle stands or falls with the principle of determinism. First of all, perhaps the examples show only accidental links of symmetry with determinism, and there is no logical connection. Secondly, perhaps the question of the possible existence of such an agency is not an empirical matter: perhaps all possible observable phenomena are at least consistent with a hidden determinism.