Some Remarks on Noncollapsing Target’s State in an Ideal Weak Measurement

We review the concept of strong and weak measurements and show that one can find eigenvalues and the related probability distribution of an observable, no matter how strong the measurement is. Considering the reduced density operator of the measurement device, we demonstrate that exact invariance of...

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Bibliographic Details
Published inJournal of Russian laser research Vol. 38; no. 3; pp. 223 - 229
Main Author Bazrafkan, M. R.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.05.2017
Springer Nature B.V
Subjects
Eigenvalues
Invariance
Lasers
Microwaves
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
RF and Optical Engineering
post selection
quantum measurement
quantum-state collapse
weak measurement
entanglement
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Summary:We review the concept of strong and weak measurements and show that one can find eigenvalues and the related probability distribution of an observable, no matter how strong the measurement is. Considering the reduced density operator of the measurement device, we demonstrate that exact invariance of the target’s quantum state has physical consequences that are not true.
ISSN:1071-2836
1573-8760
DOI:10.1007/s10946-017-9637-5