Directly Observing Momentum Transfer in Twin-Slit "Which-Way" Experiments

Abstract

Is the destruction of interference by a which-way measurement due to a random momentum transfer $\wp\agt\hbar/s$, with $s$ the slit separation? The weak-valued probability distribution $P_{\mathrm{wv}}(\wp )$, which is {\em directly observable}, provides a subtle answer. $P_{\mathrm{wv}}(\wp )$ cannot have support on the interval $[-\hslash /s,\hslash /s]$. Nevertheless, its moments can be identically zero.

5 pages, 1 figure. Almost the version almost accepted for publication in Phys. Lett. A

References in corpus (1)

• Weak Values, Quantum Trajectories, and the Stony-Brook Cavity QED experiment

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