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Selected Topics in Applications of Quantum Mechanics

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Discussion of those questions and the struggle with the well-known paradoxes of quantum mechanics like decoherence and measurement problems is as old as the quantum mechanics itself. This was just the reason for the search of formulations of any of both theories in terms of concepts characteristic for the other one. It would be injustice to condemn or disqualify those attempts. They were fruitful, enabled one to solve many concrete problems and did shed some light onto the mutual relationship of both theories. Nevertheless all mysterious features of quantum theory remained mysterious as they were. There is a whole spectrum of views; let us quote the dominant ones in a very simplified form:
1. In principle everything is “quantum”. The “classical” is an approximation of large quantum numbers in large, macroscopic subsystems of the Universe. In a sense it is a kind of “illusion” well working in a restricted range of physical phenomena. 2. Finally everything should be “classical” and the “quantum” model is phenomenological and temporary, in any case incomplete. Very often one formulates the conjecture that it is the linearity of quantum theory that is guilty. In any case: what other physical factor might be responsible for the discrepancy between unitary evolution of the unobserved microsystem and the measurement reduction phenomena? 3. Physical reality is dualistically built of two incompatible elements: quantum and classical. They are joined into a single whole via statistical interpretation of the wave function. This unification is rather mysterious from the purely classical point of view, nevertheless rigorously described mathematically by the standard probabilistic interpretation. This view is relatively popular, although it is not free of the solliptic or even divine ideas. Let us mention that both those ideas are physically justified.

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: ., 2015

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1-463

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English

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978-953-51-2126-8

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NONE

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Selected Topics in Applications of Quantum Mechani

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