Quantum measurement theory for particle oscillations

Details Quantum measurement theory for particle oscillations Quantum measurement theory for particle oscillations

2009-07-16

arxiv.org/abs/0907.2878v1

Physics

Quantum Physics

4 pages,revtex

Scientific paper

A fundamental principle of quantum theory, clearly manifested in the two-slit experiment, is that for any alternatives that cannot be distinguished by measurement physical predictions are obtained by summation of their amplitudes. In particle oscillation experiments, a particle's time of detection is not directly measured, consequently, the detection probability should involve the summation over amplitudes corresponding to different detection times. However, in contrast to the principle above, standard treatments involve summation over probabilities rather than amplitudes; this implicitly assumes the existence of a decohering mechanism. In this work, we construct the detection probabilities for particle oscillations by summation over amplitudes, corresponding to different detection times. The resulting wavelength of particle oscillations differs from the standard expression by a factor of two. Moreover, we predict a dependence of the oscillation wavelength on the threshold of the decay process used for detection.

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