Dynamics, locality and weak measurements: trajectories and which-way information in the case of a simplified double-slit setup

• URL: http://arxiv.org/abs/2403.10197v1
• Date: Fri, 15 Mar 2024 11:00:30 GMT
• Title: Dynamics, locality and weak measurements: trajectories and which-way information in the case of a simplified double-slit setup
• Authors: F. Daem, A. Matzkin,
• Abstract summary: Recent works have revisited the possibility of acquiring which-way information based on weak measurements. We investigate a simplified double-slit setup by including weakly coupled pointers. We examine how the information provided by the weak pointers can be interpreted to infer the dynamics within a local picture.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Understanding how the interference pattern produced by a quantum particle in Young's double-slit setup builds up -- the "only mystery" of quantum mechanics according to Feynman -- is still a matter of discussion and speculation. Recent works have revisited the possibility of acquiring which-way information based on weak measurements. Weak measurements preserve the interference pattern due to their minimally perturbing character while still leading to a final position detection. Here we investigate a simplified double-slit setup by including weakly coupled pointers. We examine how the information provided by the weak pointers can be interpreted to infer the dynamics within a local picture through "weak trajectories". We contrast our approach with non-local dynamical accounts, such as the modular momentum approach to weak values and the trajectories defined by the de Broglie-Bohm picture.

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