Polarization of the fermionic vacuum by a global monopole with finite core

Details Polarization of the fermionic vacuum by a global monopole with finite core Polarization of the fermionic vacuum by a global monopole with finite core

2007-01-15

arxiv.org/abs/hep-th/0701143v1

Phys.Rev.D75:065019,2007

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, 4 figures

Scientific paper

10.1103/PhysRevD.75.065019

We study the vacuum polarization effects associated with a massive fermionic field in a spacetime produced by a global monopole considering a nontrivial inner structure for it. In the general case of the spherically symmetric static core with finite support we evaluate the vacuum expectation values of the energy-momentum tensor and the fermionic condensate in the region outside the core. These quantities are presented as the sum of point-like global monopole and core-induced contributions. The asymptotic behavior of the core-induced vacuum densities are investigated at large distances from the core, near the core and for small values of the solid angle corresponding to strong gravitational fields. As an application of general results the flower-pot model for the monopole's core is considered and the expectation values inside the core are evaluated.

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