Dependence of the vacuum energy on spherically symmetric background fields- art. no. 085008

Authors
Bordag, M Hellmund, M Kirsten, K
Citation
M. Bordag et al., Dependence of the vacuum energy on spherically symmetric background fields- art. no. 085008, PHYS REV D, 6108(8), 2000, pp. 5008
Citations number
18
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
05562821 → ACNP
Volume
6108
Issue
8
Year of publication
2000
Database
ISI
SICI code
0556-2821(20000415)6108:8<5008:DOTVEO>2.0.ZU;2-M
Abstract
The vacuum energy of a scalar field in a spherically symmetric background f ield is considered. Based on previous work [Phys. Rev. D 53. 5753 (1996)], the numerical procedure is refined further and applied to several examples. We provide numerical evidence that repulsive potentials lead to positive c ontributions to the vacuum energy. Furthermore, the crucial role played by bound states is clearly seen.