Hypothesis of path integral duality: Applications to QED

Details Hypothesis of path integral duality: Applications to QED Hypothesis of path integral duality: Applications to QED

2000-03-15

arxiv.org/abs/gr-qc/0003058v2

Int.J.Mod.Phys.D10:351-366,2001

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages, LaTeX2e (uses ijmpd.sty); To appear in IJMP-D; References added

Scientific paper

10.1142/S0218271801000901

We use the modified propagator for quantum field based on a ``principle of path integral duality" proposed earlier in a paper by Padmanabhan to investigate several results in QED. This procedure modifies the Feynman propagator by the introduction of a fundamental length scale. We use this modified propagator for the Dirac particles to evaluate the first order radiative corrections in QED. We find that the extra factor of the modified propagator acts like a regulator at the Planck scales thereby removing the divergences that otherwise appear in the conventional radiative correction calculations of QED. We find that:(i) all the three renormalisation factors $Z_1$, $Z_2$, and $Z_3$ pick up finite corrections and (ii) the modified propagator breaks the gauge invariance at a very small level of ${\mathcal{O}}(10^{-45})$. The implications of this result to generation of the primordial seed magnetic fields are discussed.

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