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Vacuum Fluctuations of a massless spin-1/2 field around multiple cosmic strings

A. N. Aliev, M. Hortacsu, N. Ozdemir

gr-qcarXiv:gr-qc/9803044

Abstract

We study the interaction of a massless quantized spinor field with the gravitational filed of N parallel static cosmic strings by using a perturbative approach. We show that the presence of more than one cosmic string gives rise to an additional contribution to the energy density of vacuum fluctuations, thereby leading to a vacuum force attraction between two parallel cosmic strings.

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