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dc.contributor.authorJanssen, Michel
dc.date.accessioned2018-04-09T19:24:17Z
dc.date.available2018-04-09T19:24:17Z
dc.date.issued2018-04-02
dc.identifier.urihttp://hdl.handle.net/1853/59515
dc.descriptionPresented on April 2, 2018 at 3:00 p.m. in the Marcus Nanotechnology Building, Room 1116.en_US
dc.descriptionMichel Janssen is a historian of modern physics in the Program in the History of Science, Technology, and Medicine and the School of Physics and Astronomy (see my faculty profile) at the University of Minnesota in Minneapolis.Guiding his research in general are broader philosophical questions about scientific methodology and theory change.en_US
dc.descriptionRuntime: 66:07 minutesen_US
dc.description.abstractIn early 1927, Paul Dirac and Pascual Jordan, independently of one another, published their versions of a general formalism tying the various forms of the new quantum theory together and giving the theory’s statistical interpretation in full generality. This formalism has come to be known as the Dirac-Jordan (statistical) transformation theory. A few months later, in response to these publications, John von Neumann published his Hilbert space formalism for quantum mechanics. The relation between the two formalisms can be captured in terms of a metaphor of arches and scaffolds that I have argued fits a number of instances of theory change in physics. What is unclear in this case is whether the story is best told with Hilbert space playing the role of the arch built on transformation theory as a scaffold to be dismantled once the arch could support itself, or with transformation theory playing the role of the arch and Hilbert space providing the scaffold built to prevent Jordan’s mathematically unsound arch from collapsing. Either way, a narrative for this episode in the history of quantum mechanics based on the arches-and-scaffolds metaphor illustrates the promise of borrowing ideas from the approach to evolutionary biology known as evodevo for reconstructing genealogies of theories rather than species.en_US
dc.format.extent00:00 minutes
dc.format.extent66:07 minutes
dc.language.isoen_USen_US
dc.publisherGeorgia Institute of Technologyen_US
dc.relation.ispartofseriesPhysics Colloquiumen_US
dc.subjectDirec-Jordan statistical transformation theoryen_US
dc.subjectHilbert space formalisn for quantum mechanicsen_US
dc.subjectQuantum mechanicsen_US
dc.titleArch and scaffold: Hilbert space and transformation theoryen_US
dc.typeLectureen_US
dc.typeVideoen_US
dc.contributor.corporatenameGeorgia Institute of Technology. School of Physicsen_US
dc.contributor.corporatenameUniversity of Minnesota. School of Physics and Astronomyen_US


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