# The Modern Physics of Compact Stars and Relativistic Gravity 2015

September 30, 2015 to October 3, 2015
Yerevan, Armenia
Etc/GMT+4 timezone

## Electromagnetic Casimir densities for a cylindrical boundary in de Sitter spacetime

Oct 2, 2015, 2:40 PM
40m
Small Hall, Guesthouse

### Speaker

Prof. Aram Saharian (Yerevan State University)

### Description

Quantum vacuum effects are investigated for the electromagnetic field, induced by a conducting cylindrical shell in background of $(D+1)$ -dimensional de Sitter spacetime. We assum that the field is prepared in the Bunch-Davies vacuum state. A complete set of the electromagnetic field mode functions is determined. By using these mode functions, the vacuum expectation values (VEVs) of the electric field squared is evaluated for both exterior and interior regions. The VEVs are decomposed into the boundary-free and boundary-induced contributions. The behavior of the latter is investigated in various asymptotic regions of the parameters. For $D=3$ the boundary-induced VEV is related to the corresponding result for a cylindrical shell in Minkowski spacetime by standard conformal relation.

### Primary author

Prof. Aram Saharian (Yerevan State University)

### Co-author

Dr Vardan Manukayan (Gyumri State Pedagogical Institute)

### Presentation materials

There are no materials yet.