Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Energy-Momentum Tensor for a particle

  1. Sep 26, 2012 #1


    User Avatar

    Hello everyone,

    I was studying how to define, formally, an energy-momentum tensor for a point particle.

    I was reading this two references:http://academic.reed.edu/physics/courses/Physics411/html/page2/files/Lecture.19.pdf , page 1; and http://th-www.if.uj.edu.pl/acta/vol29/pdf/v29p1033.pdf page 1038.

    They both start from an action that I understand, it's just the action for a particle moving in space time. They, then, differentiate the action with respect to the metric to get the energy-momentum tensor, but then, somehow, they arrive at an expression that has the dirac delta in it...
    Can anyone help me out?

    Thank you
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted