• Invariance properties of the Dirac equation with external electro-magnetic field

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    • Keywords


      Dirac equation; electromagnetic field; Lie groups

    • Abstract


      In this paper, we attempt to obtain the nature of the external field such that the Dirac equation with external electro-magnetic field is invariant. The Poincaré group, which is the maximal symmetry group for field free case, is constrained by the presence of the external field. Introducing infinitesimal transformation ofx and ψ, we apply Lie’s extended group method to obtain the class of external field which admit of the invariance of the equation. It is important to note that the constraints for the existence of invariance are explicity on the electric and magnetic field, though only potentials explicity appears in the equation.

    • Author Affiliations


      N D Sen Gupta1

      1. Tata Institute of Fundamental Research, Mumbai - 400 005, India
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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