Podolsky's electromagnetism which explains some of unresolved problems of
usual QED has been investigated in the framework of finite field dependent
(FFBRST) BRST transformation. In this generalized QED (GQED), BRST invariant
effective theories are written using generalized Lorenz gauge, (1+mp2​□​)∂μAμ​=0 and no mixing gauge condition (1+mp2​□​)21​ ∂μAμ​=0, it contains higher order
derivative terms. No Mixing gauge is free from UV divergences in the radiative
correction and easier to handle. We construct appropriate FFBRST transformation
to obtain generating functional in no mixing gauge from that of in Lorenz
gauge. We show that all these BRST invariant effective theories in GQED are
basically same and are inter-connected with appropriately constructed FFBRST
transformations.Comment: 13 Pages, No fig