Mathematical trivial double about lorenz gauge $partial_muA^mu$ Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)Why is the total time derivative of this partial space derivative zero?What does it mean to square a partial derivative with a one dimensional vector (scalar)?Simplifying to Linear Differential Operator?Laplacians on Kaehler manifoldsA question about notation in derivatives inn $partial_barAL^I$Meaning of partial differentiationMultivariable calculus chain rule and change of variablesWhy is $partial_mupartial^muphi=partial^mupartial_muphi$?Gauge invariance of the Hamiltonian for particle on external electric fieldProduct rule involving partial derivatives

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Mathematical trivial double about lorenz gauge $partial_muA^mu$



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)Why is the total time derivative of this partial space derivative zero?What does it mean to square a partial derivative with a one dimensional vector (scalar)?Simplifying to Linear Differential Operator?Laplacians on Kaehler manifoldsA question about notation in derivatives inn $partial_barAL^I$Meaning of partial differentiationMultivariable calculus chain rule and change of variablesWhy is $partial_mupartial^muphi=partial^mupartial_muphi$?Gauge invariance of the Hamiltonian for particle on external electric fieldProduct rule involving partial derivatives










0












$begingroup$


$$D_mu.=partial_mu+iqA_mu$$
$(D_muD^mu+m^2)phi(x)=0$



Expliciting:
$(partial^mupartial_mu+iqpartial^muA_mu+iqA^mupartial_mu-q^2A^2+m^2)phi(x)=0$



Setting Lorenz gauge: $partial_muA^mu=0$



I do not understand why I get:



$(square +2iqA^mupartial_mu-q^2A^2+m^2)phi(x)=0$



Instead of:



$(square +iqA^mupartial_mu-q^2A^2+m^2)phi(x)=0$










share|cite|improve this question









$endgroup$
















    0












    $begingroup$


    $$D_mu.=partial_mu+iqA_mu$$
    $(D_muD^mu+m^2)phi(x)=0$



    Expliciting:
    $(partial^mupartial_mu+iqpartial^muA_mu+iqA^mupartial_mu-q^2A^2+m^2)phi(x)=0$



    Setting Lorenz gauge: $partial_muA^mu=0$



    I do not understand why I get:



    $(square +2iqA^mupartial_mu-q^2A^2+m^2)phi(x)=0$



    Instead of:



    $(square +iqA^mupartial_mu-q^2A^2+m^2)phi(x)=0$










    share|cite|improve this question









    $endgroup$














      0












      0








      0





      $begingroup$


      $$D_mu.=partial_mu+iqA_mu$$
      $(D_muD^mu+m^2)phi(x)=0$



      Expliciting:
      $(partial^mupartial_mu+iqpartial^muA_mu+iqA^mupartial_mu-q^2A^2+m^2)phi(x)=0$



      Setting Lorenz gauge: $partial_muA^mu=0$



      I do not understand why I get:



      $(square +2iqA^mupartial_mu-q^2A^2+m^2)phi(x)=0$



      Instead of:



      $(square +iqA^mupartial_mu-q^2A^2+m^2)phi(x)=0$










      share|cite|improve this question









      $endgroup$




      $$D_mu.=partial_mu+iqA_mu$$
      $(D_muD^mu+m^2)phi(x)=0$



      Expliciting:
      $(partial^mupartial_mu+iqpartial^muA_mu+iqA^mupartial_mu-q^2A^2+m^2)phi(x)=0$



      Setting Lorenz gauge: $partial_muA^mu=0$



      I do not understand why I get:



      $(square +2iqA^mupartial_mu-q^2A^2+m^2)phi(x)=0$



      Instead of:



      $(square +iqA^mupartial_mu-q^2A^2+m^2)phi(x)=0$







      partial-derivative quantum-mechanics special-relativity






      share|cite|improve this question













      share|cite|improve this question











      share|cite|improve this question




      share|cite|improve this question










      asked Apr 1 at 8:26









      Stefano BaroneStefano Barone

      402210




      402210




















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