Fermionic vacuum polarization in a higher-dimensional global monopole spacetime

2007/08/16 by E. R. Bezerra de Mello
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Noncommutative and Quantum Gravity Theories #gr-qc #hep-th

paper · pdf · doi:10.1103/physrevd.76.125021

published as Phys.Rev.D76:125021,2007 · 21 pages, 3 figures

arxiv created 2007/08/16 · openalex publication_date 2007/12/19 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

In this paper we analyze the vacuum polarization effects associated with a massless fermionic field in a higher-dimensional global monopole spacetime in the ``braneworld'' scenario. In this context we admit that our Universe, the bulk, is represented by a flat (n\ensuremath-1)-dimensional brane having a global monopole in an extra transverse three-dimensional submanifold. We explicitly calculate the renormalized vacuum average of the energy-momentum tensor, ⟨T_A^B(x)⟩_Ren, admitting the global monopole as being a pointlike object. We observe that this quantity depends crucially on the value of n, and provide explicit expressions to it for specific values attributed to n.

Citations

• Quantum Fields in Curved Space
• Stress-energy tensor for a quantized bulk scalar field in the Randall-Sundrum brane model
• Large Mass Hierarchy from a Small Extra Dimension
• Vacuum polarization effects on flat branes due to a global monopole
• The Case for a Positive Cosmological Lambda-term