Journal
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
Volume 24, Issue 8-9, Pages 1481-1488Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217751X09044851
Keywords
Vacuum polarization; cosmic string; fermionic fields
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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 it score. 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 quantumone,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 tensor, < T-B(A)> Ren, and analyse this result in some limiting cases.
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