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5 - Quantum Mechanics

Published online by Cambridge University Press:  22 April 2021

Steven Weinberg
Affiliation:
University of Texas, Austin
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Summary

Our modern understanding of atoms, molecules, solids, atomic nuclei, and elementary particles is largely based on quantum mechanics. Quantum mechanics grew in the mid-1920s out of two independent developments: the matrix mechanics of Werner and the wave mechanics of Erwin Schrödinger. For the most part this chapter follows the path of wave mechanics, which is more convenient for all but the simplest calculations. The general principles of the wave mechanical formulation of quantum mechanics are laid out and provide a basis for the discussion of spin, identical particles. and scattering processes. The general principles are supplemented with the canonical formalism to work out the Schrödinger equation for charged particles in a general electromagnetic field. The chapter ends with the unification of the approaches of wave and matrix mechanics by Paul Dirac, and a modern approach, known as Hilbert space, is briefly described.

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Publisher: Cambridge University Press
Print publication year: 2021

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  • Quantum Mechanics
  • Steven Weinberg, University of Texas, Austin
  • Book: Foundations of Modern Physics
  • Online publication: 22 April 2021
  • Chapter DOI: https://doi.org/10.1017/9781108894845.006
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  • Quantum Mechanics
  • Steven Weinberg, University of Texas, Austin
  • Book: Foundations of Modern Physics
  • Online publication: 22 April 2021
  • Chapter DOI: https://doi.org/10.1017/9781108894845.006
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Quantum Mechanics
  • Steven Weinberg, University of Texas, Austin
  • Book: Foundations of Modern Physics
  • Online publication: 22 April 2021
  • Chapter DOI: https://doi.org/10.1017/9781108894845.006
Available formats
×