Re: supersymmetric partners

Posted by DickT on September 08, 2003 at 09:29:30:

In Reply to: Re: supersymmetric partners posted by Mike2 on September 08, 2003 at 05:18:02:

Mike,

This could be seen as a symmetry, yes, but it is not one of the founding symmteries of physics. The key to physicists' understanding of symmetry is Noether's theorem. This says that if the Lagrangean for a physical system is invariant under some group of changes (symmetries), then a conserved quantity corresponding to that kind of symmetry will appear in the equations of motion derived from that Lagrangean.

Thus any Lagrangean in uniform 3-space is invariant under translations, rotations, and reparametrizations of time. This gives the respective conservation of momntum, angular momentum, and energy.

Regards,
Dick

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Follow Ups: (Reload page to see most recent)

• Re: supersymmetric partners -- Mike2 9/17/03 (7)
  • Re: supersymmetric partners -- DickT 9/17/03 (6)
    • Re: supersymmetric partners -- Mike2 9/19/03 (5)
      • Re: supersymmetric partners -- Haelfix 10/03/03 (0)
      • Re: supersymmetric partners -- Haelfix 10/03/03 (0)
      • Re: supersymmetric partners -- DickT 9/19/03 (2)
        • Re: supersymmetric partners -- Mike2 9/19/03 (1)
          • Re: supersymmetric partners -- DickT 9/20/03 (0)

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