Momentum kicks due to quantum localization

Details Momentum kicks due to quantum localization Momentum kicks due to quantum localization

2001-12-20

arxiv.org/abs/quant-ph/0112121v1

Physics

Quantum Physics

15 pages, 5 figures

Scientific paper

The momentum changes caused by position measurements are a central feature of wave-particle duality. Here we investigate two cases - localization by a single slit, and which-way detection in the double-slit interference experiment - and examine in detail the associated momentum changes. Particular attention is given to the transfer of momentum between particle and detector, and the recoil of the measuring device. We find that single-slit diffraction relies on a form of `interaction-free' scattering, and that an ideal which-way measurement can be made without any back-reaction on the detector.

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