Casimir energy of a non-uniform string

Details Casimir energy of a non-uniform string Casimir energy of a non-uniform string

1999-11-30

arxiv.org/abs/hep-th/9911248v1

Phys.Rev. D62 (2000) 025011

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, REVTeX, no figures and tables

Scientific paper

10.1103/PhysRevD.62.025011

The Casimir energy of a non-uniform string built up from two pieces with different speed of sound is calculated. A standard procedure of subtracting the energy of an infinite uniform string is applied, the subtraction being interpreted as the renormalization of the string tension. It is shown that in the case of a homogeneous string this method is completely equivalent to the zeta renormalization.

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