Directly observing momentum transfer in twin-slit "which-way" experiments
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Is the destruction of interference by a which-way measurement due to a random momentum transfer Weierstrass pgreater-than or equivalent toplanck constant over two pi/s, with s the slit separation? The weak-valued probability distribution Pwv(Weierstrass p), which is directly observable, provides a subtle answer. Pwv(Weierstrass p) cannot have support on the interval [-planck constant over two pi/s,planck constant over two pi/s]. Nevertheless, its moments can be identically zero.
Physics Letters. Section A: General, Atomic and Solid State Physics
Copyright 2003 Elsevier. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.