Real Life I: Interactions

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


We have seen in the previous sections that a useful way of combining the principles of relativity and quantum theory is to introduce the concept of fields and describe particles as their quanta. So far, we have discussed the quantization of each of the fields separately and have also assumed that, when treated as individual fields, the Lagrangians are at most quadratic in the field variables.


Perturbation Theory Energy Scale Momentum Space Ground State Energy Feynman Diagram 
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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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