Vacuum polarization by fermionic fields in higher dimensional cosmic string space-time

Details Vacuum polarization by fermionic fields in higher dimensional cosmic string space-time Vacuum polarization by fermionic fields in higher dimensional cosmic string space-time

2008-08-27

arxiv.org/abs/0808.3736v1

Int. J. Mod. Phys. A24:1481-1488 (2009)

Physics

High Energy Physics

High Energy Physics - Theory

Talk presented in the 7th Alexander Friedmann International Seminar on Gravitation and Cosmology, held in Joao Pessoa/PB, Braz

Scientific paper

10.1142/S0217751X09044851

In this paper we investigate vacuum polarization effects associated with charged massive quantum fermionic fields in a six-dimensional cosmic string space-times considering the presence of a magnetic flux running along its core. We have shown that for specific values of the parameters which codify the presence of the cosmic string, and the fractional part of the ratio of the magnetic flux by the quantum one, a closed expression for the respective Green function is obtained. Adopting this result, we explicitly calculate the renormalized vacuum expectation value of the energy-momentum tensors, $_{Ren}$, and analyse this result in some limitting cases.

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