Wave function collapse: Difference between revisions

Revision as of 17:02, 31 January 2025

Revision as of 17:07, 31 January 2025

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==History==

The concept of wavefunction collapse was introduced by [[Werner Heisenberg]] in his 1927 paper on the [[uncertainty principle]], "Über den anschaulichen Inhalt der quantentheoretischen Kinematik und Mechanik", and incorporated into the [[mathematical formulation of quantum mechanics]] by [[John von Neumann]], in his 1932 treatise ''Mathematische Grundlagen der Quantenmechanik''.<ref name="C. Kiefer-2002">{{citeCite arXivbook |authorlast=C. Kiefer |yearfirst=2002Claus |url=http://link.springer.com/10.1007/978-3-662-10557-3_19 |title=Time, Quantum and Information. |date=2003 |publisher=Springer Berlin Heidelberg |isbn=978-3-642-07892-7 |editor-last=Castell |editor-first=Lutz |___location=Berlin, Heidelberg |pages=291–299 |language=en |chapter=On the interpretationInterpretation of quantumQuantum theory—fromTheory — from Copenhagen to the presentPresent dayDay |eprintdoi=quant-ph10.1007/0210152978-3-662-10557-3_19 |editor-last2=Ischebeck |editor-first2=Otfried}}</ref> Heisenberg did not try to specify exactly what the collapse of the wavefunction meant. However, he emphasized that it should not be understood as a physical process.<ref>{{cite journal |author=G. Jaeger |year=2017 |title="Wave-Packet Reduction" and the Quantum Character of the Actualization of Potentia |journal=Entropy |volume=19 |issue=10 |pages=13

|doi=10.3390/e19100513|bibcode=2017Entrp..19..513J |doi-access=free |hdl=2144/41814 |hdl-access=free }}</ref> Niels Bohr never mentions wave function collapse in his published work, but he repeatedly cautioned that we must give up a "pictorial representation". Despite the differences between Bohr and Heisenberg, their views are often grouped together as the "Copenhagen interpretation", of which wave function collapse is regarded as a key feature.<ref>{{cite journal|title=Niels Bohr on the wave function and the classical/quantum divide |author=Henrik Zinkernagel |year=2016 |doi=10.1016/j.shpsb.2015.11.001 |journal=Studies in History and Philosophy of Modern Physics |volume=53 |pages=9–19 |arxiv = 1603.00353|bibcode=2016SHPMP..53....9Z |s2cid=18890207 |quote=Among Bohr scholars it is common to assert that Bohr never mentions the wave function collapse (see e.g. Howard, 2004 and Faye, 2008). It is true that in Bohr’s published writings, he does not discuss the status or existence of this standard component in the popular image of the Copenhagen interpretation. }}</ref>