Particle path(s) through a nested Mach-Zehnder interferometer: Reply to Griffiths

TL;DR

This paper defends Vaidman's approach to understanding quantum particle paths in nested interferometers against Griffiths' criticisms, emphasizing the validity of weak probe experiments in quantum analysis.

Contribution

The paper provides a rebuttal to Griffiths' critique, reaffirming the use of weak measurements to analyze quantum particle trajectories within the consistent histories framework.

Findings

Weak probe experiments support Vaidman's approach

Griffiths' criticisms are unfounded

Reaffirmation of the consistent histories interpretation

Abstract

Griffiths [Phys. Rev. A 94, 032115 (2016)] analyzed, in the framework of consistent histories interpretation, the controversy regarding the approach to the past of a quantum particle introduced by Vaidman [Phys. Rev. A 87, 052104 (2013)]. I argue that Griffith's criticism of my approach using analysis of experiments with weak probes is unfounded.