18-22 September 2017
Yerevan, Armenia
Etc/GMT+4 timezone

Electromagnetic vacuum densities induced by a cosmic string in de Sitter space

21 Sep 2017, 10:40
Yerevan, Armenia

Yerevan, Armenia

Department of Physics, Alex Manoogian str. 1, Yerevan, Armenia


Dr Vardan Manukyan (Shirak State University)


We investigate the influence of a cosmic string on the vacuum fluctuations of the electromagnetic field in background of (D+1)-dimensional de Sitter spacetime.
The expectation values (VEVs) of physical characteristics for the Bunch-Davies vacuum state are evaluated. The VEVs are presented in a decomposed form where
the topological parts induced by the cosmic string are explicitly extracted. The asymptotic behavior of the VEVs at large and small distances from the string is discussed.

Type of contribution Talk

Primary authors

Dr Vardan Manukyan (Shirak State University) Prof. Aram Saharian (Yerevan State University) Ms Nvard Saharyan (Yerevan State Univgersity)

Presentation Materials