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Scalar made from electromagnetic four potential

  1. Oct 6, 2011 #1
    Hi.

    What physical meaning does scalar made from inner product of electromagnetic four potential, gαβAαAβ, have?

    Regards.
     
  2. jcsd
  3. Oct 6, 2011 #2

    DrDu

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    Science Advisor

    It is kind of a mass term for the electromagnetic field, which appears e.g. in superconductors where it produces the Meissner Ochsenfeld effect.
    However, it is gauge dependent.
     
  4. Oct 7, 2011 #3
    Hi, thank you DrDu.
    Is it is related to canonical momentum replacement p → (p − eA) in Hamiltonian for charged particles ?
    Regards. 
     
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