scholarly journals Vacuum polarization induced by a cosmic string in anti-de Sitter spacetime

2012 ◽  
Vol 45 (11) ◽  
pp. 115402 ◽  
Author(s):  
E R Bezerra de Mello ◽  
A A Saharian
Keyword(s):  
Cosmic String ◽  
Vacuum Polarization ◽  
De Sitter Spacetime ◽  
De Sitter ◽  
Sitter Spacetime

scholarly journals Fermionic vacuum polarization by a cosmic string in anti-de Sitter spacetime

2013 ◽  
Vol 30 (17) ◽  
pp. 175001 ◽  
Author(s):  
E R Bezerra de Mello ◽  
E R Figueiredo Medeiros ◽  
A A Saharian
Keyword(s):  
Cosmic String ◽  
Vacuum Polarization ◽  
De Sitter Spacetime ◽  
De Sitter ◽  
Sitter Spacetime

scholarly journals Vacuum bosonic currents induced by a compactified cosmic string in dS background

2020 ◽  
Vol 29 (15) ◽  
pp. 2050103
Author(s):  
E. A. F. Bragança ◽  
E. R. Bezerra de Mello ◽  
A. Mohammadi
Keyword(s):  
Cosmic String ◽  
Axial Current ◽  
Wave Functions ◽  
De Sitter Spacetime ◽  
De Sitter ◽  
Fermionic Field ◽  
Sitter Spacetime ◽  
Compact Dimension ◽  
Complete Set ◽  
Current Densities

In this paper, we study the vacuum bosonic currents in the geometry of a compactified cosmic string in the background of the de Sitter spacetime. The currents are induced by magnetic fluxes, one running along the cosmic string and another one enclosed by the compact dimension. To develop the analysis, we obtain the complete set of normalized bosonic wave functions obeying a quasiperiodicity condition. In this context, we calculate the azimuthal and axial current densities and we show that these quantities are explicitly decomposed into two contributions: one originating from the geometry of a straight uncompactified cosmic string and the other induced by the compactification. We also compare the results with the literature in the case of a massive fermionic field in the same geometry.

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