A Quantum Field Theory View of Interaction Free Measurements
Filipe Barroso, Orfeu Bertolami
TL;DR
This paper presents a Quantum Field Theory framework for analyzing Interaction Free Measurements in a Mach-Zehnder Interferometer, highlighting momentum changes in the fields and clarifying photon emission probabilities.
Contribution
It introduces a Quantum Field Theory approach to describe IFMs, providing new insights into the momentum transfer and photon emission factors involved.
Findings
Fields experience momentum change during IFMs
Photon emission probabilities are not significant in IFMs
QFT provides a consistent description of the measurement process
Abstract
We propose a Quantum Field Theory description of beams on a Mach-Zehnder Interferometer and apply the method to describe Interaction Free Measurements (IFMs), concluding that there is a change of momentum of the fields in IFMs. Analysing the factors involved in the probability of emission of low-energy photons, we argue that they do not yield meaningful contributions to the probabilities of the IFMs.
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