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How does the Stress Energy tensor relate to Noether's theorem?

  1. Apr 8, 2010 #1
    Hi,

    I was wondering if the stress-energy tensor arose naturally in special relativity in the same way that plain energy and momentum do via Lagrangians. I understand Noether's theorem for particles, but Wikipedia describes the stress-energy tensor as a Noether current; can anyone explain what this is?
    Unfortunately, I don't know enough about differential forms to follow the standard definition. The other derivations based on dust etc. all seem a little contrived, deriving vanishing divergence almost as an aftherthought. I'm hoping that this line of inquiry will bring me more satisfaction.

    Thanks a lot!
     
  2. jcsd
  3. Apr 8, 2010 #2

    atyy

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  4. Apr 9, 2010 #3
    That's exactly what I need!
    Thanks again
     
  5. Apr 11, 2010 #4
    Sorry to bother again...I now understand the derivation of the Noether current, but which field do I apply it to if I want the standard stress-energy tensor? Is this where "spacetime as a perfect fluid" comes in to play?
     
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