quantum measurements, stochastic networks, the uncertainty principle, and the not so strange “weak values”
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ID: 213896
2016
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Abstract
Suppose we make a series of measurements on a chosen quantum system. The outcomes of the measurements form a sequence of random events, which occur in a particular order. The system, together with a meter or meters, can be seen as following the paths of a stochastic network connecting all possible outcomes. The paths are shaped from the virtual paths of the system, and the corresponding probabilities are determined by the measuring devices employed. If the measurements are highly accurate, the virtual paths become “real”, and the mean values of a quantity (a functional) are directly related to the frequencies with which the paths are traveled. If the measurements are highly inaccurate, the mean (weak) values are expressed in terms of the relative probabilities’ amplitudes. For pre- and post-selected systems they are bound to take arbitrary values, depending on the chosen transition. This is a direct consequence of the uncertainty principle, which forbids one from distinguishing between interfering alternatives, while leaving the interference between them intact.
| Reference Key |
sokolovski2016mathematicsquantum
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|---|---|
| Authors | ;Dmitri Sokolovski |
| Journal | Turkish journal of pharmaceutical sciences |
| Year | 2016 |
| DOI |
10.3390/math4030056
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