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The Meaning of the Interaction-Free Measurements

Lev Vaidman

Foundations of Physics 33 (3):491-510 (2003)

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Counterfactuality and the Physical Reality - Lessons from quantum mechanics.Nicholas Kluge Corrêa - manuscriptdetails In this essay, I'll present an example of counterfactual physical phenomena. More precisely, counterfactual definiteness and interaction-free measurements in quantum mechanics. The example used will be the Elitzur-Vaidman bomb testing experiment, which shows how we can probe the properties of objects, even when they have not been measured, i. e., counterfactual measurements. This type of physical phenomenon seems to operate by the same laws of causality as counterfactual reasoning in decision-making. After all, how can something that doesn't happen affect the (...) Download Export citation Bookmark
An Interaction-Free Quantum Measurement-Driven Engine.Cyril Elouard, Mordecai Waegell, Benjamin Huard & Andrew N. Jordan - 2020 - Foundations of Physics 50 (11):1294-1314.details Recently highly-efficient quantum engines were devised by exploiting the stochastic energy changes induced by quantum measurement. Here we show that such an engine can be based on an interaction-free measurement, in which the meter seemingly does not interact with the measured object. We use a modified version of the Elitzur–Vaidman bomb tester, an interferometric setup able to detect the presence of a bomb triggered by a single photon without exploding it. In our case, a quantum bomb subject to a gravitational (...) Download Export citation Bookmark
On the Interpretative Essence of the Term “Interaction-Free Measurement”: The Role of Entanglement. [REVIEW]Renato M. Angelo - 2009 - Foundations of Physics 39 (2):109-119.details The polemical term “interaction-free measurement” (IFM) is analyzed in its interpretative nature. Two seminal works proposing the term are revisited and their underlying interpretations are assessed. The role played by nonlocal quantum correlations (entanglement) is formally discussed and some controversial conceptions in the original treatments are identified. As a result the term IFM is shown to be consistent neither with the standard interpretation of quantum mechanics nor with the lessons provided by the EPR debate. Download Export citation Bookmark 1 citation
On Interchangeability of Probe–Object Roles in Quantum–Quantum Interaction-Free Measurement.Stanislav Filatov & Marcis Auzinsh - 2019 - Foundations of Physics 49 (3):283-297.details In this paper we examine Interaction-free measurement where both the probe and the object are quantum particles. We argue that in this case the description of the measurement procedure must by symmetrical with respect to interchange of the roles of probe and object. A thought experiment is being suggested that helps to determine what does and what doesn’t happen to the state of the particles in such a setup. It seems that unlike the case of classical object, here the state (...) Download Export citation Bookmark
A Quantum Field Theory View of Interaction Free Measurements.Filipe C. R. Barroso & Orfeu Bertolami - 2020 - Foundations of Physics 50 (8):764-771.details We propose a Quantum Field Theory description of beams on a Mach–Zehnder interferometer and apply the method to describe Interaction Free Measurements, 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. Download Export citation Bookmark

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