Real Life II: Fermions and QED

  • Thanu Padmanabhan
Part of the Graduate Texts in Physics book series (GTP)


The formalism of quantum field theory we have developed in the previous chapters allows us to think of (what we usually call) particles as quantum excitations of (what we usually call) fields. The clearest example is that of a photon which arises as an excitation of the electromagnetic field. We have also discussed how we can describe the interaction of the particles, say, e.g., their scattering, starting from a field theoretical description. We did all these using a scalar field and the electromagnetic field as prototypes.


Dirac Equation Lorentz Transformation Lorentz Group Complex Scalar Dirac Spinor 
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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Thanu Padmanabhan
    • 1
  1. 1.Inter-University Centre for Astronomy and AstrophysicsPuneIndia

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