Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2000-10-08
Class.Quant.Grav. 18 (2001) 2331
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
9 pages, submitted to Class. Quantum Grav
Scientific paper
10.1088/0264-9381/18/12/308
The Casimir stress on a spherical shell in de Sitter background for massless scalar field satisfying Dirichlet boundary conditions on the shell is calculated. The metric is written in conformally flat form. Although the metric is time dependent no particles are created. The Casimir stress is calculated for inside and outside of the shell with different backgrounds corresponding to different cosmological constants. The detail dynamics of the bubble depends on different parameter of the model. Specifically, bubbles with true vacuum inside expand if the difference in the vacuum energies is small, otherwise they collapse.
Mansouri Reza
Setare Mohammad R.
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