Cancellation of ultraviolet divergences for locally flat metrics

M. Hortaçsu*, N. Özdemir

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We extend the work done for cosmic strings on the perturbative calculation of vacuum polarization of a massless field in the space-time of multiple cosmic strings and show that for a more general class of locally flat metrics, the one-loop calculation does not introduce any new divergences to the vev of the energy of a scalar particle or a spinor particle.

Original languageEnglish
Pages (from-to)3081-3090
Number of pages10
JournalModern Physics Letters A
Issue number38
Publication statusPublished - 14 Dec 1998
Externally publishedYes


We thank Prof. Dr. A. N. Aliev for giving his results and calculations to us prior to publication and for extensive discussions. Discussions with Profs. A. Büyükaksoy, A. H. Bilge, Ö. F. Dayi, Y. Nutku are also gratefully acknowledged. This work was partially supported by the Scienti c and Technical Research Council of Turkey and M.H. work was also supported by the Academy of Sciences of Turkey.

FundersFunder number
Academy of Sciences of Turkey
Scienti c and Technical Research Council of Turkey


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