Consistent histories, the quantum Zeno effect, and time of arrival

Details Consistent histories, the quantum Zeno effect, and time of arrival Consistent histories, the quantum Zeno effect, and time of arrival

2000-03-13

arxiv.org/abs/quant-ph/0003041v1

Phys. Rev. A 62, 032103 (2000)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.62.032103

We present a decomposition of the general quantum mechanical evolution operator, that corresponds to the path decomposition expansion, and interpret its constituents in terms of the quantum Zeno effect (QZE). This decomposition is applied to a finite dimensional example and to the case of a free particle in the real line, where the possibility of boundary conditions more general than those hitherto considered in the literature is shown. We reinterpret the assignment of consistent probabilities to different regions of spacetime in terms of the QZE. The comparison of the approach of consistent histories to the problem of time of arrival with the solution provided by the probability distribution of Kijowski shows the strength of the latter point of view.

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