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How are intertwinners related to conservation laws?

  1. Oct 23, 2011 #1

    naima

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    In "The Algebra of Grand Unified Theories" http://arxiv.org/abs/0904.1556" [Broken] john Baez (see page nb 9) shows how the conservation of eigenvalues (T3 isospin)
    appears if there is an intertwiner between the representation spaces of the symmetry group.
    I discovered intertwiners for the first time in LQG (in this forum).
    Can one avoid lagrangians to explain conservation laws with them?
     
    Last edited by a moderator: May 5, 2017
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  3. Oct 25, 2011 #2

    naima

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    I think it will be easier if i quote Baez:
    I was surprised to see a conservation law without reference to Noether nor lagrangians.
     
  4. Nov 1, 2011 #3

    naima

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    Hi Marcus

    When you opened the thread 'intuitive content of LQG' intertwiners appeared in the first posts
    meteor said:
    and Self Adjoint gave a good answer:

    and that closed the exchange on that point
    8 years later i come back with a well known text of John Baez beginning with the notion of intertwiners.
    And i got no answer about its physical importance. (250 readers)
    Do you think that during these 8 years such things became so intuitive, so basic
    that it deserves no comment?
     
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