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I Why this system has a rotational symmetry in Dirac equation?

  1. Dec 23, 2017 #1
    why system has a rotational symmetry in dirac equation?
    is that a general property of all systems?
  2. jcsd
  3. Dec 24, 2017 #2


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    Because Dirac equation was initially applied to free-electrons and an electron in hydrogen atom. Space of constant potential and that containing only one atom (generally multiple electron) must have rotational symmetry. If, however, you want to extend Dirac equation to diatomic molecules, rotational symmetry does not apply.
  4. Dec 26, 2017 #3
    Thank you so much. it's really helpful!
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