Casimir energy of a nonuniform string - art. no. 025011

Authors
Hadasz, L Lambiase, G Nesterenko, VV
Citation
L. Hadasz et al., Casimir energy of a nonuniform string - art. no. 025011, PHYS REV D, 6202(2), 2000, pp. 5011
Citations number
30
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
05562821 → ACNP
Volume
6202
Issue
2
Year of publication
2000
Database
ISI
SICI code
0556-2821(20000715)6202:2<5011:CEOANS>2.0.ZU;2-N
Abstract
The Casimir energy of a nonuniform string built up from two pieces with dif ferent speeds of sound is calculated. A standard procedure of subtracting t he energy of an infinite uniform string is applied, the subtraction being i nterpreted as the renormalization of the string tension. It is shown that i n the case of a homogeneous string this method is completely equivalent to zeta renormalization.