Physics – Quantum Physics
Scientific paper
2005-07-04
Il Nuovo Cimento 122 B (2007) 267-276
Physics
Quantum Physics
13 pages. Accepted for publication in Il Nuovo Cimento B
Scientific paper
10.1393/ncb/i2007-10003-x
A discussion of the quantum mechanical use of superposition or entangled states shows that descriptions containing only statements about state vectors and experiments outputs are the most suitable for Quantum Mechanics. In particular, it is shown that statements about the undefined values of physical quantities before measurement can be dropped without changing the predictions of the theory. If we apply these ideas to EPR issues, we find that the concept of non-locality with its 'instantaneous action at a distance' evaporates. Finally, it is argued that usual treatments of philosophical realist positions end up in the construction of theories whose major role is that of being disproved by experiment. This confutation proves simply that the theories are wrong; no conclusion about realism (or any other philosophical position) can be drawn, since experiments deal always with theories and these are never logical consequences of philosophical positions.
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