The ground state energy of a massive scalar field in the background of a semi-transparent spherical shell

Details The ground state energy of a massive scalar field in the background of a semi-transparent spherical shell The ground state energy of a massive scalar field in the background of a semi-transparent spherical shell

1998-11-17

arxiv.org/abs/hep-th/9811164v3

J.Phys.A32:5679-5691,1999

Physics

High Energy Physics

High Energy Physics - Theory

15 pages, 5 figures

Scientific paper

10.1088/0305-4470/32/30/312

We calculate the zero point energy of a massive scalar field in the background of an infinitely thin spherical shell given by a potential of the delta function type. We use zeta functional regularization and express the regularized ground state energy in terms of the Jost function of the related scattering problem. Then we find the corresponding heat kernel coefficients and perform the renormalization, imposing the normalization condition that the ground state energy vanishes when the mass of the quantum field becomes large. Finally the ground state energy is calculated numerically. Corresponding plots are given for different values of the strength of the background potential, for both attractive and repulsive potentials.

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