Regularization of the vacuum fluctuation energy in quantum   electrodynamics
  It is shown that the total energy of the vacuum fluctuations of the electron-positron and electromagnetic fields in the quantum electrodynamics can be equal to zero if the "bare" electron charge is chosen by adequate way. The value of "bare" electron charge calculated from this condition proves to be in a qualitative agreement with that one which was found independently from the solution of the "physical electron" problem. 
I.D.Feranchuk, S.I.Feranchuk
physics.gen-ph