Anomalous Weak Values are Caused by Disturbance

In combination with post-selection, weak measurements can lead to surprising results known as anomalous weak values. These lie outside the bounds of the spectrum of the relevant observable, as in the canonical example of measuring the spin of an electron (along some axis) to be 100. We argue that th...

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Bibliographic Details
Published in:Foundations of physics 2022-02, Vol.52 (1), Article 20
Main Author: Ipsen, Asger C.
Format: Article
Language:English
Subjects:
Classical and Quantum Gravitation
Classical Mechanics
Electron spin
History and Philosophical Foundations of Physics
Philosophy of Science
Physics
Physics and Astronomy
Quantum Physics
Relativity Theory
Statistical Physics and Dynamical Systems
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Summary:In combination with post-selection, weak measurements can lead to surprising results known as anomalous weak values. These lie outside the bounds of the spectrum of the relevant observable, as in the canonical example of measuring the spin of an electron (along some axis) to be 100. We argue that the disturbance caused by the weak measurement, while small, is sufficient to significantly affect the measurement result, and that this is the most reasonable explanation of anomalous weak values.
ISSN:0015-9018
1572-9516
DOI:10.1007/s10701-021-00534-w