Fermionic vacuum polarization by a composite topological defect in higher-dimensional space-time

Details Fermionic vacuum polarization by a composite topological defect in higher-dimensional space-time Fermionic vacuum polarization by a composite topological defect in higher-dimensional space-time

2008-06-11

arxiv.org/abs/0806.1944v1

Phys.Rev.D78:045021,2008

Physics

High Energy Physics

High Energy Physics - Theory

20 pages, 2 figures

Scientific paper

10.1103/PhysRevD.78.045021

We investigate the vacuum polarization effects associated with a charged massless spin-1/2 field in a higher-dimensional space-time, induced by a composite topological defect. The defect is constituted by a global monopole living on a three-brane and two-dimensional conical space transverse to the latter. In addition, we assume the presence of an extra magnetic flux along the core of the conical space. The heat kernel and the Feynman Green function are presented in the form of a sum of two terms. The first one corresponds to the contribution coming from the bulk with global monopole in the absence of conical structure of the orthogonal two-space, and the second one is induced by this structure and the magnetic flux. We explicitly evaluate the part in the vacuum expectation value of the energy-momentum tensor induced by the flux carrying conical structure. As in pure cosmic string geometries, only the fractional part of the ratio of the magnetic flux to flux quantum leads to non-trivial effects. The vacuum energy-momentum tensor is an even function of this parameter. We show that for strong gravitational fields corresponding to large values of the solid angle deficit, the effects induced by the conical structure and flux are exponentially suppressed.

Affiliated with

Also associated with

No associations

Rating

Fermionic vacuum polarization by a composite topological defect in higher-dimensional space-time does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Fermionic vacuum polarization by a composite topological defect in higher-dimensional space-time, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fermionic vacuum polarization by a composite topological defect in higher-dimensional space-time will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-266453