What inspired Dirac's formulation of quantum theory?

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Discussion Overview

The discussion centers on the historical context and inspiration behind Paul Dirac's formulation of quantum theory, particularly regarding his use of "q-numbers" and the influence of Werner Heisenberg's work. Participants explore the origins of Dirac's ideas and seek to clarify the relationship between Dirac's contributions and those of Heisenberg.

Discussion Character

  • Historical, Exploratory, Conceptual clarification

Main Points Raised

  • One participant notes that Dirac referred to the Heisenberg equation of motion in a modest manner, suggesting a historical significance to this naming.
  • Another participant proposes checking Dirac's original articles from 1925 and 1926 to verify claims about his contributions.
  • A different participant suggests that Dirac was inspired by Heisenberg's Helgoland article, asserting that this influence shaped Dirac's approach to quantum theory.
  • Some participants express admiration for Dirac's presentation of quantum theory, arguing it is superior and more accessible for students familiar with Hamiltonian mechanics and Lie-algebra theory.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the specific reasons behind Dirac's formulation of quantum theory, and multiple viewpoints regarding his inspirations and the historical context remain present.

Contextual Notes

Some claims depend on interpretations of historical texts, and there are references to specific editions of Dirac's work that may not be widely available, which could limit verification of certain statements.

victor94
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"historically the Heinsenberg equation of motion was first written by P. A. M Dirac, who - with his characteristic modesty- called it the Heinsenberg equation of motion."
Modern quantum mechanics/ J.J. Sakurai, page 84

Why dirac did that?, I didn't find any source.

Any information about this will be appreciated
 
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I will check Dirac's articles on QM from 1925 and 1926 to see if this is true. I don't have the 1930 (1st) Edition of his QM treatise, the book is so rare...:(
 
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I think Dirac was inspired to his formulation of quantum theory in terms of what he then called "q-numbers" by reading Heisenberg's famous Helgoland article, which deeply impressed him. Nevertheless, I think Dirac's presentation of QT is the best of all the early papers on the subject. It's the way, I think, QT should be presented from the very beginning. It's easy for students who have heard a good lecture on Hamiltonian mechanics with Poisson brackets and some good portion of Lie-algebra theory coming naturally with it.
 

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