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  1. Pascual Jordan's resolution of the conundrum of the wave-particle duality of light.Anthony Duncan & Michel Janssen - 2008 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 39 (3):634-666.
    In 1909, Einstein derived a formula for the mean square energy fluctuation in blackbody radiation. This formula is the sum of a wave term and a particle term. In a key contribution to the 1926 Dreim¨.
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    On the verge of umdeutung in minnesota: Van vleck and the correspondence principle.Anthony Duncan & Michel Janssen - unknown
    In October 1924, The Physical Review, a relatively minor journal at the time, published a remarkable two-part paper by John H. Van Vleck, working in virtual isolation at the University of Minnesota. Van Vleck used Bohr's correspondence principle and Einstein's quantum theory of radiation to find quantum formulae for the emission, absorption, and dispersion of radiation. The paper is similar but in many ways superior to the well-known paper by Kramers and Heisenberg published the following year that is widely credited (...)
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  3.  19
    Pascual Jordan's resolution of the conundrum of the wave-particle duality of light.Anthony Duncan & Michel Janssen - 2008 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 39 (3):634-666.
  4.  52
    Mind your p's and q's: Von Neumann versus Jordan on the Foundations of Quantum Theory.Anthony Duncan & Michel Janssen - unknown
    In early 1927, Pascual Jordan published his version of what came to be known as the Dirac-Jordan statistical transformation theory. Later that year and partly in response to Jordan, John von Neumann published the modern Hilbert space formalism of quantum mechanics. Central to both formalisms are expressions for conditional probabilities of finding some value for one quantity given the value of another. Beyond that Jordan and von Neumann had very different views about the appropriate formulation of problems in the new (...)
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  5.  16
    The trouble with orbits: The Stark effect in the old and the new quantum theory.Anthony Duncan & Michel Janssen - 2014 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 48 (1):68-83.
  6.  6
    On the verge of Umdeutung in Minnesota: Van Vleck and the correspondence principle. Part one.Michel Janssen & Anthony Duncan - 2007 - Archive for History of Exact Sciences 61 (6):553-624.
    In October 1924, The Physical Review, a relatively minor journal at the time, published a remarkable two-part paper by John H. Van Vleck, working in virtual isolation at the University of Minnesota. Using Bohr’s correspondence principle and Einstein’s quantum theory of radiation along with advanced techniques from classical mechanics, Van Vleck showed that quantum formulae for emission, absorption, and dispersion of radiation merge with their classical counterparts in the limit of high quantum numbers. For modern readers Van Vleck’s paper is (...)
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  7.  51
    From canonical transformations to transformation theory, 1926–1927: The road to Jordan's Neue Begründung.Anthony Duncan & Michel Janssen - 2009 - Studies in History and Philosophy of Modern Physics 40 (4):352-362.
  8.  8
    On the verge of Umdeutung in Minnesota: Van Vleck and the correspondence principle. Part two.Michel Janssen & Anthony Duncan - 2007 - Archive for History of Exact Sciences 61 (6):625-671.
    This is the second installment of a two-part paper on developments in quantum dispersion theory leading up to Heisenberg’s Umdeutung paper. In telling this story, we have taken a 1924 paper by John H. Van Vleck in The Physical Review as our main guide. In this second part we present the detailed derivations on which our narrative in the first part rests. The central result that we derive is the Kramers dispersion formula, which played a key role in the thinking (...)
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  9.  64
    Pascual Jordan's resolution of the conundrum of the wave-particle duality of light[REVIEW]Anthony Duncan & Michel Janssen - 2008 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics.