157 citations · 572 across the 9 of their papers we have counts for
7 papers · 1 filter
Dependence of the vacuum energy on spherically symmetric background fields
M. Bordag, M. Hellmund, K. Kirsten
The vacuum energy of a scalar field in a spherically symmetric background field is considered. Based on previous work [hep-th/9608070], the numerical procedure is refined further a…
The heat kernel coefficient for oblique boundary conditions
J. S. Dowker, K. Kirsten
We present a method for the calculation of the heat kernel coefficient of the heat operator trace for a partial differential operator of Laplace type on a compact Riemann…
Casimir energy in the MIT bag model
E. Elizalde, M. Bordag, K. Kirsten
The vacuum energies corresponding to massive Dirac fields with the boundary conditions of the MIT bag model are obtained. The calculations are done with the fields occupying the re…
Spectral invariants for the Dirac equation on the d-Ball with various boundary conditions
J. S. Dowker, J. S. Apps, K. Kirsten +1
The mode properties for spectral and mixed boundary conditions for massless spin-half fields are derived for the --ball. The corresponding functional determinants and heat-kerne…
Casimir energy of a massive field in a genus-1 surface
K. Kirsten, E. Elizalde
We review the definition of the Casimir energy steming naturally from the concept of functional determinant through the zeta function prescription. This is done by considering the…
Zeta function determinant of the Laplace operator on the -dimensional ball
M. Bordag, B. Geyer, K. Kirsten +1
We present a direct approach for the calculation of functional determinants of the Laplace operator on balls. Dirichlet and Robin boundary conditions are considered. Using this app…
Bose-Einstein condensation for interacting scalar fields in curved spacetime
K. Kirsten, D. J. Toms
We consider the model of self-interacting complex scalar fields with a rigid gauge invariance under an arbitrary gauge group . In order to analyze the phenomenon of Bose-Einstei…