Spinor Green function in higher-dimensional cosmic string space-time in the presence of magnetic flux

Details Spinor Green function in higher-dimensional cosmic string space-time in the presence of magnetic flux Spinor Green function in higher-dimensional cosmic string space-time in the presence of magnetic flux

2008-02-29

arxiv.org/abs/0802.4401v2

JHEP 0809:005,2008

Physics

High Energy Physics

High Energy Physics - Theory

27 pages, 6 figures. This version accepted for publication in JHEP contains a minor modification and two new references

Scientific paper

10.1088/1126-6708/2008/09/005

In this paper we investigate the vacuum polarization effects associated with quantum fermionic charged fields in a generalized $(d+1)-$dimensional cosmic string space-times considering the presence of a magnetic flux along the string. In order to develop this analysis we calculate a general expression for the respective Green function, valid for several different values of $d$, which is expressed in terms of a bispinor associated with the square of the Dirac operator. Adopting this result, we explicitly calculate the renormalized vacuum expectation values of the energy-momentum tensors, $_{Ren.}$, associated with massless fields. Moreover, for specific values of the parameters which codify the cosmic string and the fractional part of the ratio of the magnetic flux by the quantum one, we were able to present in closed forms the bispinor and the respective Green function for massive fields.

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