Angular Momentum

  • Arno Bohm
  • Piotr Kielanowski
  • G. Bruce Mainland


The diatomic molecule, which was considered in the previous chapter as an important example of a physical system that can be described as a harmonic oscillator, not only vibrates, but also rotates. The Hamiltonian H of a rotating diatomic molecule, which is the generator of time translations, commutes with all the position operators Qi, the momentum operators Pi and the angular momentum operators Ji. These operators are generators of an algebra of observables. In this chapter attention is initially restricted to the subalgebra of the angular momentum operators Ji, the generators of the rotation group.

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© Springer Nature B.V. 2019

Authors and Affiliations

  • Arno Bohm
    • 1
  • Piotr Kielanowski
    • 2
  • G. Bruce Mainland
    • 3
  1. 1.Department of PhysicsUniversity of TexasAustinUSA
  2. 2.Department of PhysicsCINVESTAVMexico CityMexico
  3. 3.Department of PhysicsOhio State UniversityColumbusUSA

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